Because I have bigger balls than these three fine gentlemen, I would like to add that small bit of % and say it's 100% scam, (just kidding, of course, only about the balls' part).
OP, are you aware that MiningRigRental, Nicehash, and other platforms have a HUGE amount of hashrate for "rent"? mind you, more often than not, the cost is just 100%+ some fees, so if a miner makes 10$ a day, you can almost always rent it for 10$ + a small fee, so it's not like the world has hashrate shortage issues and someone would offer you 50% extra on top of that 100%, if they desperately need to rent hashrate, they can acquire it from all those famous platforms, so why would anyone pay you anything extra when they can buy it there? it MOST certainly and 100% makes exactly no sense.