Having local search engines, mapping services, dominating webmail platforms and multiple social networks is itself an innovation. Innovation might happen when you have those, it would obviously never happen if you don't.
Few countries, mostly asian, dare to sustain that. Rest of the world can not.
I'm yet to see an example when a community proceeded with copying for an extensive period of time and didn't come up with innovations.
Also I'm yet to see an example when a community didn't copy things already existing in the field. It's just not how it works.
E.g. Phonecian alphabet -> hebrew -> greek -> latin, cyrillic. Even hangul were drawing insights from both hieroglyphs and alphabets.
And, more often than not, "clone of X" means "tl; dr; but it looks like X". People seldom bother.
Vkontakte = direct ripoff of facebook
What's the innovation?