All these days, it was free or zero cost to withdraw USDT TRC20 but suddenly from today, they have changed it to 0.20 USDT. I don't know if BUSD fee was 0 from the beginning or not but now it has been decreased to 0. The target is to boost the use of BUSD. This is the manipulation of Binance. There’s more to come.
I don't think it's manipulation, it's a marketing strategy. This way people will use BUSD more than USDT TRC20 for withdrawals from Binance.