The 600% APR in MEXC's Earn Carnival covers 200 USDT. Here's what each tier is worth in real money

Tier one: new depositors only

Accounts that hadn't made a first deposit before the event get 600% APR on USDT and BTC and 200% on ETH. The caps are small: 200 USDT, 0.005 BTC and 0.1 ETH of principal. APR is annualised, so 200 USDT at 600% for one week comes to roughly 23 USDT of interest, not 1,200. The rate is a hook. The cap is what decides the payout.

Tier two: net-deposit boosters

Hold a net deposit for 3 days and you unlock a USDT APR booster: 15% on up to 2,500, 20% on up to 5,000, or 30% on up to 10,000. For bigger balances this is the part that adds up. A 30% boost on 10,000 for the remaining ~13 days is worth roughly 107 USDT.

Tier three: uncapped stablecoin products

USDT Earn Plus pays up to 10%, USD1 up to 11%, USDC up to 6%, USDGO up to 5%, and holding USDD or USDE on Spot earns up to 5%. None of these has a subscription cap, and they're the yields that last beyond the promo.

Why traders should care

Idle margin sitting in a futures wallet earns nothing. If you keep a cash buffer between SOL or XRP trades (or parked behind a DOGE setup), a double-digit stablecoin rate is real carry, as long as you check how fast you can redeem before you need it for margin. MEXC also says regional, KYC and product eligibility rules apply to every user.

Which tier fits how you actually hold cash between trades?