I used AllAdvantage back in the day, mouse moving script and all. Ran it 14-16 hours a day on a second computer and made $40-$60 a month. Can't complain.

The down-side was the overhead, it was a noticeable strain on my computer, which is what prompted me to set it up on a dedicated machine. Pretty sure I was on dial-up then too, which just made things worse.

There was a large group of us on IRC all doing the same thing. Little jerks like us ruined it for everyone.