Everybody wants to pay you online for taking surveys, participating in polls, clicking banners and inviting friends to somewhere! lots of respect and nice cares to make you stare at the monitor. actually I know some rare companies do the job in honesty (and obviously they benefit from it!) but 95% of these sort of site are just pretenders who will take you in a loop of other same sites.
it'd getting worse when they want you to pay a little (20 or 25 USD, even 5) for registering. and do not forget about spams!
at last I think the root of such activities is people's airy hopes to have an online income. social networking is going to build more values and waste more values (like time) at the same time, it's up to you to take the advantages or ...!