Worth a try, perhaps, but make sure you use a throwaway email address with your signup.
As Mortiis said, most of these sites are either scams or the work involved is more than would be required to actually go out and earn the equivalent amount of money via conventional means.
As Mortiis said, most of these sites are either scams or the work involved is more than would be required to actually go out and earn the equivalent amount of money via conventional means.