I did a lot of affiliate marketing in the past, I had a couple of template websites where I gave away hundreds of free templates with resale license and also had offers for paid templates from Templatemonsters (not sure).
Got asome nice commissions from that, but this was almost 10 years ago.

Also made some good deals back in the day by buying cheap keywords on Adwords and promoting campaigns with an unrestricted Adwords policy. You know, spend 500 dollars in Adwords and get around 750 dollars in affiliate earnings.