Here is what the destination page says: That seems pretty iffy with the AdSense ToS -- to my reading of the ToS.
I think this is totally hilarious and since adsense publishers get banned for invalid clicks, this adwords user should get banned from adwords for lifetime aswell. Especially this line: "Adsense Clix is unlike any other traffic exchange, as rather than manual surfing, the surfers actually CLICK on your adsense* adverts, therefore increasing your sites revenue!" I am no Adwords user, but think of the useless loss of money Adword users are experiencing due to such "great" services.
There was a guy about these parts asking about a similar service (may even have been this one) who had spoken to google who had said it acceptable - many of us disagreed or at least thought it highly questionable. I can't find the thread though. The problem we had was how to make it cost effective as you weren't guaranteed getting anything more back than you put in, due to the variable amounts publishers earn. I wouldn't touch it with a bargepole to be honest