Hi everyone, Solana has just recently launched a native SPL USDT token. However, wrapped USDT is still in circulation and is what is currently used in the RAYUSDT pool.

If you are sending USDT from FTX to your SPL wallet, you will now receive native USDT not Wrapped USDT.
As the RAYUSDT pair is with wrapped USDT, for now you will not be able to farm using native USDT. A migration for the native and wrapped USDT is possible in the near future so please stay tuned on this.