Like my high school teacher that told us "If you don't vote on election day, you aren't allowed to complain about government laws", if you are going to complain about ads, make sure you go and actually, you know, buy games...like Indie Games for example, or at worst some XBLA games. And never click the ads. If you are like me though, and it says "Free 1600 pts drawing!!!" you will probably be clicking them, and that's why they still exist. I login to PSN Store on my new PSP and the first page has some ads, some sale advertisements...they are still ads, it's not Slim Jim's or Eskimo Ice Cream, but it's ads.
Any service is bound to evolve and eventually snare your leg like a toothed clamp trap when business is involved...I love being able to find music on YouTube but I hate the commercials that are on almost all the major music artists official pages these days. I can't blame them for trying to make money, but that doesn't mean I won't go find something else if it gets to the point I can find content in different ways (if I had a way to do similar thing through my TV or even Xbox I would not go through YouTube anymore). Being able to watch South Park without commercials and uncensored on Netflix is also some sort of epiphany to me.