I agree, what you say, But not everyone posses a high-end PC or a miner to mine cryptocurrencies profitably like me, But this platform help me to earn BTC with my low-end PC and it seems fair to me if the Developers take some my earning for themselves. I can't buy a miner or a better PC to mine, But I can spend a few dollars to get referrals and earn BTC. Peace Bro.