They seem to be a pretty agressive bunch. I remember they held an SEO contest some time ago, then after getting the thousands of links to ambatch.com, they turned it into a social site where memebrs can put links to uploaded videos on Youtube. Then all adsense income from the page your video is in, gets split between the user and their company.
I think their Adsense account got banned in no time. I imagine people did nothing but click on the ads on their own video pages.