Why People Join Communities?

Mylot  : Most of the members join to earn money from this site . Mylot is one of the best paying sites . Members can also get friends and knowledge from this Mylot site . Orkut  : Orkut is a network of friends and networking communities . Orkut is mainly used by old friends of schools / colleges ... Technical Communities  : Members join to get their problems solved ; and to share their technical knowledge . Members discuss various nontechnical things under general sections (lounge) .