I don't use it very much, maybe once or twice a month because it messes up so much. Even with that, I have earned between $1 and $2 per month. Not much, I know, but I really don't use it much at all.
I really don't like the bars because they are so cumbersome. I have heard people say this is the most reliable bar around.
I have it up now and it is working fine. Of course, the problem could be mine because of how many windows I open at once too...just thought of that.
If you decide to try it, I hope you have good luck with it. I seem to be the kiss of death with rewards programs right now. Every one I like and do well with goes under.