when you buy 10 coins, you want to sell them, but the exchange takes 0.1% from the coin.

you want to sell 9.99 coins, but the exchange does not allow you to do this. why can't I sell 9.99 coins, only 9 or 10? this is done specifically to freeze the remaining amounts, which you then have to convert for 2%.

you only sell 9 coins. and you convert 0.99 coins with a 2% fee.

this is a regular racket!