Our own porn search platform
pornobug.com actually penalizes tubes, not because we asked it to, just because of the algorithms in our search methodology.
Every search platform, including Google and
pornobug.com uses complex mathematical constructs to perform ranking. I know how ours works, nobody except Google knows how theirs works.
However at a recent technology conference in Melbourne I attended, I did discuss this very subject with a rep from Google AU and they do appreciate the problem, whether or not they do anything about it is another story. You see Google does not serve you, they serve the web users, if the web users value particular sites then you can bet your bottom dollar that Google will help facilitate that.