Off-Topic: Why AdWords?
Why would I want to create income from you? Are you going to click on links simply because they came up in the word-association algorithm created by Google? I don't think so. In addition, I don't want to have any association to gold sellers, pawn shops, etc. that might come up. I'd want control. I tried the Amazon Associates thing and well, it didn't spawn anything. Honestly, my account has $0.10 in it. I wasn't hurt when Amazon pulled the whole thing due to our current Governor's failed sales tax policy.
Will I put random ads on my site? Nope. I don't want the manliest soda ads showing up.
Do you know someone who has? Has it paid off for them?