[socialmediaking]

The clone can be profitable if you are able to make it appealing enough to a specific niche, because you can then have hyper targeted content and ads. I wouldn't think an exact clone of Quora or Groupon would work, but a version tailored to a specific Groupon niche would be able to have deals more targeted than a general one, and a Quora clone could have ads that appeal to the questions on the pages that are niche-specific. Also, look for ways to mutate and twist the existing version, not just simply clone it completely.