You might find this post interesting, maybe not.
...But I averaged what how much per sale he made in a year he made well over a million bucks.
It turns out he averaged $442 per sale.
Thing is... he sells low-priced front end products, mid-end products, and high end products and services.
One of his sales funnels looks something like this...
Low, low priced irresistible offer to get the paying customers in the door > customer is also taking a trial offer by which he/she will pay about $30/mo after 30 days and can cancel at any time > OTO upsell for a mid to high-end product > upsell to a coaching program priced in the thousands
BTW, affiliates get commissions at every step in the funnel.