6 Social Networks that (promise to) Pay

For a new social network to gain a piece of the pie from leaders MySpace and Facebook, it has to exhibit something different. Something that would attract potential members. But how else could a social network make itself different when MySpace and Facebook seem to have everything? For these 6 social networks, giving incentives or paying their members is their strategy to build membership base. I’ve tried a couple of these social networks that pay (or at least that promises to pay) but I never did anything to promote them to my friends and so I ‘vet never earned a single dime.