Well, finally, at least one answer on the topic. Thanks for the info.
I work as a Webmaster and I have more than 200 websites running. On such a number of sites, it seems to me, you can make money.
I'll try - I'll see what happens in a month.
Most likely it won't work anyway as fortunately most browsers got updated to prevent mining.
Ads will be much more profitable and less sneaky.