Gate.io has piqued my interest with access to a number of less common altcoins that I haven't found on other exchanges. I registered, deposited 850 USDT, and over about three months, I traded pairs like SOL/USDT and some memcoins, which were listed there earlier than on other platforms. The standard commission is around 0.2%, but a few times I experienced extended spreads during high volatility. In the end, the results were break-even—about +10 USDT, more from market growth than active trading. The interface isn't very simple, but there are opportunities to find rare coins.