They'd either die because they couldn't afford the server bills or die because they went commercial. Some left gaping holes in forums etc when they changed.
But when they pulled an image and you're just shown a placeholder "PhotoBucket - image not available", you actually see their name and logo and have repeated negative associations with them. I know when I hear any of those names I just get pissed thinking about all the old forum posts and rotting internet pages I've stumbled across with the images missing.