What are those screenshots? Old or some country break down or something? Why not post what google trends actually shows?
http://www.google.com/trends?q=tube8...e=a ll&sort=1
http://www.google.com/trends?q=tube8...e=al l&sort=1
Youporn isn't taking a drop, it's still up along with redtube. tube8 is the only thing with real recent growth out of that list. None of the other tubes compete.
Keep dreaming the dream...