While most of these companies advertise that you can earn upwards of $18 or so an hour, the reality is that you're not going to make that much once you figure in your gas expenses and wear and tear on your car. Also, work may not always come in consistently. I would recommend doing more than one of these if you really want to make it worth your while.
What’s the catch? None, really. Cash back apps act as affiliates for many online merchants, which means that whenever you make a purchase through one of the apps, they get a small commission — but then, they give you a portion of that commission as “cash back”. For example, if I buy a pair of Nike shoes through the Ebates app (or website) and spend $75, Ebates may get a $10 commission but then they’ll pass $7 back to me. It’s basically a way to get sale prices on stuff that isn’t on sale!