Personally I like working with Aliexpress affiliate. Aliexpress is a huge marketplace with a variety of stuff. It pays up to 50% commission, I think it's the best one! If smbd is a beginner I advisehim to follow a guide from Alipartnership.There are step-by-step instructions on how to become successful with Aliexpress- http://alipartnership.com/guide
Firstly, regarding your own benefits, an affiliate email marketing program or virtually any affiliate program should have the potential to generate a stable, or even growing, income stream for you. Even if it is a side income, it should ideally be a decent amount of money that will add to your monthly cash flow and make this venture worth your while.