What a fascinating window into this hidden yet enormous neverending game of whack-a-mole.<p>I was initially surprised that Microsoft dwarfs the RIAA in requests, but of course their software sells at much higher prices than albums. I wonder how popular an artist has to be for the RIAA to consider it worth paying someone to find links and submit requests...<p>It also sounds like an enormous burden (read: barrier to entry) for search engines. I'm sure Google is constantly optimizing just how much of the process it can automate. (ex. If a submitter has had X requests approved for Y domain, remove it automatically?) I love how they let webmasters know about it, though, to remove fears of false positives.