First of all, I want to note that someone always makes money at the exchange, and someone loses money. Otherwise, it does not work. I earn on arbitration, for me, conveniently, the rate on yobit is always higher than on Exmo, BitForex, or Binance. I agree, it is not very profitable to output BTC, but there are a lot of other currencies for this purpose. You can trade a lot of coins in pairs with BTC, moreover, almost all markets are live and active. Sometimes it is interesting to read the chat, See full review