In my opinion, at the point LivingSocial copied Groupon's business model, they weren't a startup anymore; before that they were a social app on Facebook.
Not that they stopped being a startup because they copied groupon
Crazy to see the downvote mafia around here on this kind of thing.
In any event, I think they were a startup at that point in time, but I can see how reasonable people might disagree.
:)