seems a bit crazy to use 3 devices, i would suspect many users would get busted for having the same ip.

I just started trying this a few days ago, as I like to see whats out there. Seems you can leave it on overnight for up to 3-4 hours before it asks if you are still there. It generates about a dimes worth of crypto in that time-but then again maybe I am blocking some ads by mistake. It doesn't count views by videos watched, it counts by certain video ads that are not part of the video stream and those don't always appear after a normal video. 10 cents a day is about $36/year. Not really something useful as a source of income in the usa (unless you are a kid), but probably overseas assuming it works there.
I am also finding that if you leave the video playing in its own window in the background, it still chugs along. I always keep my pc on mute.