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.
Write a blog. If you have a business, consider starting a blog as part of your marketing plan. You can write how-to articles, product reviews, answers to questions and posts about upcoming events. Blogs give you more flexibility than other forms of social media like Facebook or Twitter because you own the content and aren’t bound by a third party’s rules or restrictions. Also, if your posts include keywords or phrases and link to internal and external content, you can improve the search optimization of your website. Blogs drive sales because you can include product information and links to product pages. 
Another industry that has seen better commissions recently is the “making money” vertical. Along the same lines of Forex trading platforms, products or programs that help people earn money at home are also giving out average (or better than average!) affiliate commission rates. Products such as website hosting, WordPress themes and plugins, marketing products and other related items are all offering great commission rates.
You may have heard of ClickBank, one of the oldest and most popular affiliate networks. A billion-dollar company, ClickBank specializes in digital products like e-books and software, as well as membership sites. If you are comfortable selling information and don’t want the management and administration hassles of “real” businesses, this may be a good starting point. Its commissions can be anywhere from 10% all the way to 75%.
Understand why affiliate marketing is advantageous. Affiliate marketing is inexpensive. Not only is it free to join an affiliate program, but you also don’t have to deal with storing or shipping products or with providing customer support. Also, it is a source of passive income. You can be earning money even when you’re not working at your computer. Finally, it allows you to work from home.
Affiliate marketing is one of the most popular monetization techniques for niche publishers in 2014, being used by hundreds of thousands of sites in a wide variety of verticals. Affiliate marketing is popular for a number of reasons, including the potential for success with a relatively small audience and the deep pool of affiliate partners willing to pay to acquire new customers.
Media reporter Mathew Ingram tweeted, "Not great for media who rely on affiliate revenue[,]" potentially a nod to popular gadget reviews The Wirecutter, which was acquired by The New York Times. Technology journalist Michael Morisy quipped, "Amazon reworks affiliate program, cutting commissions 50% for electronics. Guess they think Jet threat has passed?" in a reference to up-and-coming Amazon rival Jet.com, which sold to Walmart in a deal largely regarded as a failure for the startup.
Check out what competitors are offering and how they structure their affiliate programs because that'll be a good place to start. It's also what your affiliates are going to be comparing you to when deciding whether to endorse you or someone else. Remember, your affiliates have many options of products/services to represent so they're going to want to choose products that convert well and offer a decent payout.
Building trust with your audience is paramount in affiliate marketing, and the quickest way to lose trust is to recommend products either you haven’t used before or that aren’t a good fit for your audience. Also make sure you never tell anyone to directly buy a product, you are simply recommending the product. The more helpful you are and the more you make quality recommendations, the more likely your web visitors will come back for your expertise.
Affiliate marketing overlaps with other Internet marketing methods to some degree, because affiliates often use regular advertising methods. Those methods include organic search engine optimization (SEO), paid search engine marketing (PPC – Pay Per Click), e-mail marketing, content marketing, and (in some sense) display advertising. On the other hand, affiliates sometimes use less orthodox techniques, such as publishing reviews of products or services offered by a partner.