I am mining on Nicehash. I am using "Nicehash Legacy" miner on Windows system. My cards are "selling" hashrate to someone who wants to mine specific coin and paying extra for it. You see, Nicehash works as a exchange platform between miners and people who buy hashrate.
That way, I am always getting only BTC to my balance, no shit coins, which I wouldn't know what to do with anyway. If I want shitty coins, I'd buy them myself, to invest.
So that's what I am doing, selling my hashrate to someone and I am getting paid more for it, they need to care about shit coins and I am just getting paid with BTC. You could do that too if you are not convinced which coin you want to mine.