It's amazing to me that these internet billionaires have really cool, popular, useful websites that are unique, and used for their uniqueness. Then they spend all their time and money trying to make the site into a clone of some other popular site because they view them as competitors. What they actually end up doing is destroying what made their website special to begin with, and then we the users end up with a few sites that are desperately trying to clone each other, that don't actually work well for anything anymore.