This might be the answer for those who seek answer on how _______ is popular in Indonesia. You can replace the _______ with Facebook, Twitter, Foursquare and probably next, Quora. When a few people use a certain service, most of the people in the community (the influencers) will follow, start expanding and building their own network on the service.
So, is Quora the next big thing in Indonesia? We'll have to wait and see.