If you are a student it would be quite enough to cover your petrol expenses. I expected to earn more as the ad said, but never managed to reach close to the sums they offer. Anyway, the service is okay, I always received the funds but it is too much hustle with photos etc.
I did not believe it first, but decided to try. After I registered, I paid $10 to "apply" for the sticker - after the needed business which wanted to advertise was found, they returned me the money. I earned $125 since June. Not much, but easy money I should say!