“... in a way that respected your real-time compute resources ...” That is to say, your machine is constantly mining 24 hours / day at an extremely preemptable

“... in a way that respected your real-time compute resources ...” That is to say, your machine is constantly mining 24 hours / day at an extremely preemptable low-priority on behalf of the various sites you visited that day. Definitely it can’t work that you’re only mining on behalf of the site while you’re actively looking at it, because when you’re sitting in front of your device is precisely when you don't want to be mining! As far as how much advertising value does the average internet user provide in a day? Facebooks ARPU is about $25 in the US. And apparently Facebook users spend an average of 50 minutes per day on Facebook. So that’s 8.2 cents per hour, so we’re within an order of magnitude!