Web-mining for revenue generation is inevitably becoming a legitimate alternative to ad based streams. Especially on "torrents" sites, dark net markets and the like. Goes without saying, should be opt-in. But providing the users a choice: would you rather view a video ad, or use 50% of CPU to mine join a pool while your consume our content, I'd estimate more than half would choose to allow CoinHive to run. Naturally, these services are trivial to block as well.<p>For large sites (100M+ user per month), web mining revenue may be less than 10% of current ad monetization rates. But factoring in cryptocurrency appreciation and ability to quickly transact digitally and anonymously with mined coins, adds another dimension to the possibility space. Epect this trend to continue.