HotOrNot, Slide, Flickr, Digg, Reddit, Last.fm, WordPress etc. These are ones we know because we are in a western society. There many other big hits in other c

HotOrNot, Slide, Flickr, Digg, Reddit, Last.fm, WordPress etc. These are ones we know because we are in a western society. There many other big hits in other countries that we have not heard of as they are not reported by western media e.g. until recently I never heard of shaadi.com and thats a big Indian player with a western bias which only gets reported as it is in English language and also doing well in English speaking countries There are many more big players in China, Russia etc., all depends on what your assessment criteria is as they did not mention that in the article.