Hi, Jamie! Very good list. I needed something like this for 2018 so that I know what to target in the future blogs I create. As for now, I’m comfortable using SiteGround affiliate network and it’s pretty good actually. Their hosting service is pretty much the best considered its price. I’ve tried others but SiteGround stands out. I’ll also try new affiliate networks, something from the list you have just provided. I think Amazon is too saturated at the moment, and I need a better network. 2018 will be interesting indeed.
Setting up a free Cloudflare account is a must for any website. It’ll add a performance boost and security with almost 0 effort. One tweak I recommend in Cloudflare is turning your wp-content/uploads directory into a fully cached directory using page rules. This means Cloudflare will serve all images from cache acting as a free CDN plus it's very simple to set up. Once you have the budget you can spring for the $20/m Cloudflare account which will automatically compress your images on the fly.
In addition to Amazon’s clear commitment to conversion rates (read: probable sh*tloads of testing), the extreme growth of Amazon Prime. Estimates from top firms calculated Amazon has between 65 and 80 million prime subscribers in early 2017, which is up from about 54 million just a year earlier. The huge boost in Prime subscriptions has apparently had a massive impact on conversions.