There might not be a catch so much as that if enough people start exploiting a system like this, they eventually change it. It has to start costing them enough that they care about it. I've abused shit like this in the past and the gravy train generally eventually comes to an end. They can't do anything to you about it, you just eventually can't do it any more. They might eventually just put people who do this on a list.I don't quite believe there isn't a catch somewhere. I understand in credit churning, they offer good deals knowing that enough people will screw up to make it worthwhile. People will pay interest, get behind on a card, etc. He insists that for debit churning the bank is relying on is the inconvenience factor to discourage people from gaming the system. It does require some careful tracking to make sure you cancel as soon as you meet the requirement, and I guess he has to talk to Payroll frequently to split parts of his paycheck up.
What sort of products do people buy?I set up a Redbubble Shop in 2014 for a Facebook fan page I had (sport niche) and it brought in around 1200-1500$ extra a month. Now it's been a few years, the shop still exists (page doesn't) and still brings in 190-210$ on a good month without doing anything for it.
Something else I can recommend is ClickBank and JVZoo. Not as affiliate marketer, but as vendor. It's incredible easy to throw something together (be it a simple desktop software), make a nice landing page and then have 20-30 Pajeets market your product the same week, or if you want to put in a bit extra effort contact some professional affiliates and give them a higher share than you give the Pajeets.
Don't have exact numbers in my head because it's been a while since I released the last product, but it brought in roughly 70K a year on average with 8-10 ongoing hours of extra work a week (to keep up with affiliate requests). It's definitely great side money if you have an otherwise comfy job that doesn't pay great but you don't really want to drop it because of work life balance.
Just don't fall for the "affiliate millionaire / dropship guru" shit.