How these sites makes money?

I want to understand how these sites or companies make money from the users and how they can pay out $25.00 per month?

http://gotgascert.com/

http://www.freegasolineamerica.com/

http://www.monthlyfreegas.com/

how do they pay out $25.00 in gas credits when someone does spend $100.00 in gas purchases to get the $25.00 rebate check. - lets say a tire seller places an ad that says _ BUY 3 tires get 4th free and $300.00 of free gas! - and 200 customers buy the tires and participate in the rebate deal. How do these site pay out (200 customers $25.00 or $5,000.00 monthly?
thanks

 

My guess is ... there's some kind of a catch and a big one at that. Why dont u try it and tell us?

 

Yah, good idea. Man, you can try it and tell us how it works.

 

they make money via surveys ive seen surveys that pay 120$ a shot. when i was at uni i had a part time job that i went around my hometown and i give out surveys you got 5 quid if you found a person that was willing to do the survey the person then got 60 quid for doing it. market research or it could be some nasty catch.

 

If you are from the US; you could try them and let us know hehe.

 

Usually gas rebates have a catch that you have to send in receipts from the same gas station over a period of time, and when you reach a certain amount, you get the rebate.

It works because people forget, don't want to be bothered sending in receipts, and the odds that most people get gas at the same station all the time are slim...so basically yeah, they may be real, but there is always a catch.

Not sure if that is how this one works, but that is usually the common scheme.