Since I'm doing the address transfer from kraken, I'm first charging my usd card to kraken, then kraken converts usd to usdt, and then transferring the money via trc address or Ploygon address, with preference given to the Ploygon address.
The amount of this transfer is 50usd
50 usd converted to 49.5639 usdt
When transferring money, different addresses charge different fees.
In case of tron address: 4usdt fee
In case of a Ploygon address: 1 usdt fee
Ploygon is less expensive and recommended!