ClickBank allows you to join for free, and the approval process is virtually automatic, so it’s a great choice for people entering the affiliated game for the first time. ClickBank has a ton of information, including FAQs, walk-throughs, and videos available, so the barrier to entry is quite low. There’s also a (paid) program called ClickBank University with courses and assistance from experienced marketers. https://www.youtube.com/watch?v=3iE-Bo34Fnc
Shopify is a very popular site building platform for people interested in building eCommerce stores. It has been around for the past few years and seen significant growth in its user base over this time. You can earn a staggering 200% per sale for every new customer you refer to them, which means that there is up to $2400 per new customer on offer.