Could cryptominers be the good alternative to ads?

Everyone hates ads. Frankly, no one wants to pay for anything online. And places like CoinHive offer a service that doesn't clutter the screen and pays people. Too good to be true right? Well the first group of people to latch on the service ramped up the mines to 8 threads at 100% because they were hackers and didn't care if they slowed your computer or drained your battery. They just wanted their almost untraceable money.

What I'm proposing is that if sites were to use miners that instead use 2/4 threads at 10% thereby using far less resources, across enough users provided your traffic is ok, could the results be tangible if we gave it a chance?

edit: I hate cryptocurrency but I was more trying to discuss the idea of getting paid for passive CPU usage more described in this comment by @spctrvl