QUOTE(RezwanKabir @ May 12 2012, 09:46 PM)
Actually, it is known as PPC ( pay per click) site. For visiting every site you will get payment. It will vary for different site. PPC is used for getting good page rank as well as more visitor for a website. If you have enough visitor then you will get good page rank in the search engine. Chittika is one of the better ppc site.
Chittika is now popular in the world but is that worth?
Will let you know after checking that site.