I said this before Global Test Market are one of the best paying survey sites here is even more proof that they pay and pay well.
I receive on average 2 or more survey invitations a day and sometimes many more even if I do not qualify for the surveys they give me 5 points .
The highest payed survey I received so far from them was one paying 700 market points that is US$35.00.
This check is for US$ 98.95