Loads of affiliates do that.
I'm doing a conference call with a few guys tomorrow who make between 7 and 8 figures a year on Clickbank.
A few months ago Clickbank had a seminar/meeting with the top affiliates and vendors. No one in the room made under 7 figures a year. Most well into the 8 figures.
We all hate on Clickbank, and for good reason (99% pure shit), but when it comes to the select few products/affiliates that aren't shit there's big money.
Especially when you have thousands of little affiliates suckering those fat broads into paying $37, give the affiliate a cut, and then put the person through a cycle where they can come out - if they spend the maximum - giving the vendor well over two thousand dollars (and the affiliate who fought to get that sale leaves happily with his $30 cut or whatever).
Actually pretty interesting stuff.