Guess it works if you were going to buy something anyway.
I know people who use Ebates and say...LOOK at all this money I got back....yeah, but look at all the junk you bought that you didn't need!
I don't get that thinking...
Yeah, I suppose so. The Dosh app allows you to link up a credit or debit card and it gives you cash back when you use those linked cards at certain specific stores. So if you don't mind being monitored - you just get cash back when you buy stuff that you are already buying anyway. I've earned about $4 from shopping at Sams Club.
They also had a deal where you could get $25 + 5% cash back if you searched for and reserved a hotel room through the app. Last November, I had a need for a room on an overnight trip with my mother, so I used the app to find a cheap room.
So in this case, it has all been for stuff I have otherwise needed anyway.