Eventually the Internet came along and the Trading Post no longer commanded the secondhand market like it once did (though it did successfully transition online). It quickly became clear that eBay was the winner when it came to secondhand commerce online. As a result my first experience making any money from the Internet was selling old games, toys and electronics on eBay.
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!