The reason why sticking with a plan is so important is that it lets you invest at low prices, allowing your money to go further by buying more shares. When stocks recover, you'll own more shares and earn particularly strong returns on the investments you made at or near market lows. Capitalizing on those opportunities will have a definite positive impact on your long-term returns -- as long as you have the discipline to pull the trigger when the time comes.
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!