Exactly, its not a stealth thing. Imagine everyone on trading view gets free full access, in the background it uses 20% CPU for a while as you read and view charts.
Sounds like a win win.
This charity web miner idea I also really like. Quite tempting to set that up and let monerians vote on the charity each few months.
There are already specific plugins for Chrome (No Coin) and Firefox (CoinBlock 1.0) to block coin-hive. The adblockers will soon also block the js coin miners by default. Don't really see coin-hive having much traction long term consumers will not stand for it.
That's irrelevant, you give incentive to people to want to javascript mine, for premium access time, game items, whatever. It's for websites with large userbase. You don't stealth mine in background like a fucking asshole raping their cpus and wasting their power while they have no idea what is going on.
And it is working pr0gramm.com users mined 5k usd worth of monero in just a week.