I think this is an issue with the game's PUBLISHERS, not the DEVELOPER. The Developers hate having their testing exercise get over-run by more people than they could listen to if they wanted to. Now sure, they want the game to succeed too, but their job is to make a good game first and foremost, and tens of thousands of non-testers isn't the way to get that job done. It's the publisher (or the publishing side of the company, if they have both in house) that's concerned with marketing, with only the slightest testing benefit (i.e. stress testing) to the actual developers.