Can someone point to an example where a website where a clone was more successful, or even on the same level of success as the original? To be clear, Facebook w

Can someone point to an example where a website where a clone was more successful, or even on the same level of success as the original? To be clear, Facebook was not in any way a clone of Myspace or Friendster. I'm talking about someone who posts a request saying "I want a clone of X website" and then proceeds to turn that into a successful business.