I have had some succes with the "paid to signup/affiliate" programs.
cashcrate.com - Paid twice. So far I have got about 70$ from this site.
crazycybercash.com - Paid once 21$.
treasuretrooper.com - Paid twice (getting a 146$ check within one week!). My overall earnings with this site are about 230$. This is my favourite program.
Alltogether I have earned over 300$ with these 3 affiliate programs.
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[Only registered and activated users can see links. Either login above or
Register Now] is a free "get paid to" program. You get paid by filling surveys,
trying free products and referring new members. I have earned all together 836$ during my 2 year membership.