It's not clear to me whether the user is aware of what's going on ("let" implies the users have a choice but nothing in the copy affirms that) If they do, this

It's not clear to me whether the user is aware of what's going on ("let" implies the users have a choice but nothing in the copy affirms that) If they do, this could be cool: I'd happily run a bit coin miner while reading an article rather than hitting a paywall. But if it's done without my permission I'll be upset when some rogue tab drains my battery.