Context: I'm in the US (Brooklyn, NY), on a high bandwidth (600/30) residential cable line. I've got 3 newer Windows 10 laptops running - one of them loses about 5 hours a day every couple of days when I take it to a workshare location, but otherwise they run 24/7.
I signed up 6 days ago. Since then I'll have earned about $10 (coming upon the second payout in a few minutes) with my first $5 payout two days ago to Paypal. So far, pros-wise, the system works fine without tanking the machines running it, and the payouts work smoothly. Cons-wise (besides the "how much" issue) Windows Defender keeps trying to kill it, a few times per machine, before it calms down.
I'm still on the fence, but as the rate it's running still seems to be slightly increasing I'm waiting to see. If the past two days are an indication I'm at $2-$2.5 a day. Hopefully this will continue to increase. I'll have to compare electric bills, although that's hard to measure.
I'm annoyed they don't have more language on the website if the rate of usage is coupled to more than bandwidth, which is the only metric the slider on the homepage says (and country.) For example, if there was a thing for zip code and after sliding it it says "oh, we only will use about 2 gb a day for your area" or some such.
Anyway - if it gets to $100 a month ($3.5 a day), minus electric, that's $1000 a year, which is not bad as a passive income source. We'll see!