I actually don't mind the idea of websites using my CPU to mine for crypto instead of serving ads. Provided, of course, that there are some limits imposed on how much CPU they can actually use... and provided there's some kind of notification.
I'm kind of curious how youtube was affected by this. A friend was telling me that apparently it was malicious code injected into the ad network, or something?
RE: Could you be mining for some else's gains!?