Outbrain is not necessarily the network of choice, it was just an example. As for tracking the ROI usually you'll want to track campaigns in Google analytics and track clicks on affiliate links as event and average value/email or you'll want to duplicate the post and run paid traffic to the duplicate so you know exactly what the conversions are as you can put them in separate email lists etc too.
Some websites pay for performance based on page views for virtually anything you want to write about if you have the proven experience and background to cover your beat. Many companies are looking for part-time bloggers to help them create high-value blog posts for their websites. This, in turn, creates great opportunities for those who have a knack for writing compelling content. Most clients pay per post or on a retainer contract with a set number of posts delivered per month.
Before I share the strategies that I’ve used to generate over $100,000 in affiliate commissions per month at this point, there are two extremely important rules I use when promoting products that are not my own. You don’t have to use these rules in order to become an affiliate or be successful at it, but it’s what has helped me grow my affiliate income tremendously over the last couple of years:
If my piece of content is so unique and valuable around hiking backpack recommendations, that other reputable outdoor websites are willing to link to it and build the page’s authority, then I’d have a very real opportunity to rank high in organic search for these search terms (meaning, my page will come up first when someone searches for hiking backpacks).