I think this idea has some serious flaws. In fact, I believe the project will fail because people don't want their CPUs being used for mining. Period. They don't want adds, but they want to mine Cryptos for someone else even less. Just look at the recent headlines about crypto-currency mining adds. I know they aren't the same. However, when people hear about this, they are going to equate it with the same thing. If it ever makes it mainstream, their will be major backlash.