I wanted to reward people that want to promote DocPress and the easiest way was to create a simple affiliate program. I am using FirstPromoter https://firstpromoter.com/ to track the sales and affiliates, they have a simple Stripe integration that I really like. I saw that now they integrate with Paddle which is great. I can use that for my other project DropSpace.co.
For DocPress we offer an 80% commission on the first sale with a 60 day cookie period. Affiliates can earn up to $80 from our Agency plan being the most expensive.
Running your own affiliate program might be a bit of work but to enter an affiliate network the costs are high and I can always migrate later if this works well.