Fact-Check: Ethena Gas Tests & Sutton BIN 537100 Truth

1. Core Summary: Overview of Three Recent Crypto Card Debates

Recently across X (Twitter) and various crypto card communities, three major discussions have triggered intense debate:

1. Ethena Pay & ether.fi Cash Malaysia Fuel Test:A creator published real-world spending breakdowns showing RM100 spent at a Malaysian gas station: Ethena Pay incurred ~1.14% FX loss and earned 4% cashback (RM2.90 net profit); ether.fi Cash incurred ~1.39% FX loss and earned 3% cashback (RM1.63 net profit).
2. "Bitget, Gate & GoPay share Sutton Bank employee card" rumor:Posts claimed Mastercard granted Sutton Bank a special 537100 corporate BIN, with Sutton allocating sub-ranges to Bitget (0047), Gate (0074), and GoPay as Corporate cards, asserting cardholders legally count as Sutton Bank employees holding legitimate "employee cards."
3. Bitget Wallet Card "Full Mainland China ID Support" Promo:KOLs claimed the Bitget Wallet Card supports "full mainland Chinese IDs, no proof of address, and no foreign phone number," boasting 3% cashback alongside referral affiliate links.

To clarify the facts and prevent misleading claims, we cross-checked official fee schedules, cardholder agreements, public BIN registries, and field test receipts across all three topics.

2. Field Test Audit: Ethena Pay & ether.fi Malaysia Fuel Test & FX Loss Math

Cross-referencing issuer terms with transaction receipts confirms the creator's numbers and accounting logic are largely sound:

1. Advertised cashback tiers are accurate

• Ethena Pay：The official pricing page specifies Standard tier earns 4% on the first $2,500 in monthly eligible spend, validating the advertised "up to $100/mo cashback"; spend above $2,500 drops to 1%, and above $4,000 earns 0% [1]。
• ether.fi Cash：Official terms show Core members earn 3% on the first $2,000 in monthly eligible spend, dropping to 1% and 0.5% thereafter [2]。

2. Foreign exchange losses fall squarely within standard ranges

• Ethena Pay：Official documentation notes non-USD FX fees typically hover around 1%, levied directly by card networks without platform markup [1]. The 1.14% FX loss on RM100 falls entirely within standard card network exchange spreads.
• ether.fi Cash：Terms state base FX fee is approximately 1%, plus up to 0.5% member markup for Core [3]. The 1.39% observed FX loss sits squarely within the 1.0%–1.5% expected range.

3. Accounting arithmetic is correct

Net gain calculation is mathematically sound:4.04 − 1.14 = RM2.90，3.02 − 1.39 = RM1.63. Observed cashback of RM4.04 slightly exceeded RM100 × 4% because the processor calculated rewards against the gross debited total including FX fees (101.14 × 4% ≈ RM4.05), which is logically consistent.

4. Geographic availability matches current status

Ethena's latest regional roster explicitly marks the United Kingdom as "Coming soon," while Malaysia is already live [4], aligning with the creator's statement about waiting for UK availability.

3. Rumor Audit 1: Truth Behind Sutton Bank 537100 "Employee Card" Claims

Regarding claims that Bitget, Gate, and GoPay share Sutton Bank 537100 Corporate employee cards, registry lookups and card agreements show partial BIN overlaps but thoroughly debunk the core conclusions:

1. 537100 is indeed a Sutton Bank Corporate card BIN

Cross-checked with international BIN databases and settlement networks,537100 is registered to US chartered commercial bank Sutton Bank on Mastercard, explicitly categorized asCorporate Purchasing Card, rather than a personal prepaid card [5]; further query of 53710074 also points directly to Sutton Bank [6]。

2. "Shared Origins" is only partially true; key deductions are false

• Bitget field BIN differs:Community cardholders testing Bitget's newly issued US card confirmed the actual prefix is 5371 0058, rather than 0047 [7]. Furthermore, Bitget Wallet Card historically relied on DCS Card Services, Fiat24, and Immersve in other jurisdictions [8], and is by no means universally issued by Sutton.
• Gate card scheme and issuer do not match:Gate's official help center fee page does not list Sutton Bank as the issuing bank [9]. Official Bridge announcements confirm Gate US virtual cards run on the Visa network(issued by Lead Bank, managed by Bridge via Stripe Issuing). Claims that "Gate and GoPay are identical projects" are unverified third-party speculation [10]。
• GoPay is definitely not on the 5371 BIN:Community feedback confirms GoPay operates on the Visa network [10]. All standard Visa cards begin with the digit 4 , making it mathematically impossible to use the Mastercard prefix 5 (5371).
• "Fixed allocation of 7th–8th digits" lacks evidence:Because Bitget tested as 0058 rather than 0047, and 53710074 historically pointed to another USD card (YPT) [13], claims that the bank assigns fixed 7th–8th digits to specific B2B clients are unfounded.

3. Correcting two major myths: Standard BaaS issuance vs "Employee Card" falsehoods

• ❌ "Mastercard granted Sutton special batch licenses" is a misconception:Sutton Bank is an established US embedded banking (BaaS) provider routinely powering fintech card programs like Cash App and Wirex [11] [12]. This is standard commercial BaaS partnership, not an exclusive special authorization.
• ❌ "We are Sutton Bank employees holding employee cards" is completely false:The Axiona cardholder agreement cited in posts explicitly states enterprise administrators designate individuals as"Authorized Users"to transact on behalf of the company [14]. Cardholders are merely designated users under a corporate account—they hold no employment relationship with Sutton Bank and are definitely not bank employees.
• ❓ Legality and compliance deductions do not hold:Bank issuance does not guarantee immunity from regulatory action. Sutton Bank received a Consent Order from federal regulators in 2024 [15]. Crucially,individuals using corporate purchasing cards generally lack statutory consumer protections applicable to personal accounts (such as unauthorized chargeback rights under Regulation E / Regulation Z)。

4. Rumor Audit 2: Verifying Bitget Wallet Card "Full Mainland ID" Promo Claims

Regarding claims that Bitget Wallet Card now supports "full mainland China IDs, no POA, no foreign phone, and 3% cashback," our verification reveals:

1. Cashback screenshots match official policy

Official rules confirm Bitget Wallet Card offers 2% base cashback, rising to 3% for new users or upon spending $200–$400/month (payable in USDC, BTC, etc.), with up to $20 in new-user rewards [16] [17]. The cashback screenshots shared in community posts are authentic.

2. "Full Mainland ID" obscures real operational hurdles

• Passports mandatory; national IDs unsupported:Testers confirmed selecting mainland China as residential country is currently allowed without utility bill proof of address (POA);however, verification strictly mandates a Chinese Passport, rejecting national resident identity cards [7]. Equating "mainland ID" with resident national ID cards is deeply misleading.
• Proxy connections must be disabled:Users report that applying under VPNs or overseas proxies routes them to older DCS programs; native network routing is required to access this BIN [7]。
• "No foreign phone required" is uncommitted:Official terms make no permanent commitment waiving foreign phone numbers; risk policy changes can mandate supplemental verification at any time.

3. Official documentation exhibits direct contradictions

• Help center strictly prohibits:Bitget's official help center explicitly states:"Mainland China users can no longer apply for new cards" [18]。
• Marketing portal lists support:Yet the updated web portal includes mainland China among supported regions [19]. No official press release has been issued regarding the 537100 BIN or Sutton Bank partnership.
• "Quick Premium Card" does not officially exist:No product named "Quick Premium Card" appears in documentation. Bitget Exchange's legacy "Premium Card" ceased accepting new applications on 2026-08-01, directing users to the Web3 wallet [20]. The promotional posts feature referral links, exhibiting typical affiliate tactics creating artificial urgency to farm commissions.

5. Summary & 4-Point Cardholder Protection Guide

Based on our cross-verification, we advise cardholders to consider these key principles:

1. Assess reward token mechanics:Whether Ethena's AVAX or ether.fi's ETHFI, secondary market price corrections quickly erase net gains. Treat rewards as FX fee offsets, not high-yield investments.
2. Distinguish personal from corporate cards:Corporate purchasing cards under third-party entities lack statutory deposit insurance and consumer chargeback protections in disputes.
3. Be wary of "all-exempt ID" promo posts:Whenever posts claim instant mainland ID opening alongside affiliate links, cross-check official terms to avoid gray-market account bans or identity leaks.

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