If there’s one reason to believe that Photobucket will succeed in a crowded photo-sharing world, it’s not because they just passed Flickr. Their 26 million users are still dwarfed by the hottest social photo app, Instagram, with over 65 million. No, the reason that Photobucket may succeed is because the decade-old company already has a foothold when it comes to generating revenue while Instagram is just getting started.