Hi,
I have been a member of UPROMISE for about a year. I have earned about $500.00 so far. I have earned .77 on the grocery program after waiting about 2 months. The money gets transfered into my Fidelity Brokerage account when it gets over $50. You can either work their program and try to maximize the contributions or just get accidental money. You register your credit cards and they check if you go to one of their merchants. This is like IDINE. You do not have to go through their web page to get contributions. You register your grocery card # and if you buy the right products - coke for example - you get a few pennies. Yes, it is a loss of privacy.
There is also another site BABYMINT that is similar. BABYMINT pays you if you buy from EBAY. You do have to go through BABYMINT web site to get credit for shopping.
Hopes this helps,
Matt