Adsense users:

[jfodale]

Now that you know how the system works, do you ever click on other people's AdSense ads?

I used to click on them from time to time, but now, I rarely do.

[lowster11]

If I see something I want to check out I do.

[freetraff]

I also click adsense to get extra search. Sometimes I click when I like the site and want to give its owner some extra bucks.