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As of now when I am trying to transfer TRX from one exchange to another I pay 0.1 TRX. Which I consider very less when I compare fees of native tokens. If I want to transfer USDT then I will use Binance exchange for it and use BSC wherein within the exchange and sending USDT to another exchange that support BSC I will not be paying any fee.
I didn't know TRX had use cases apart from USDT/TRC20, are you using that blockchain for other uses like DEX, smart contract bridges or anything.