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
You say that when people make says from your affiliate link it can be a one time transaction however you failed to mention list building which is crucial if you want to make a full time income strictly off of affiliate marketing. I also disagree with your notion that affiliate marketing is not a real business. You can still brand yourself and build credibility even if you don’t own your own product.