There are typically no upfront costs when it comes to joining an affiliate program, but your variable ongoing costs will depend on how you want to promote the products. If you choose to outsource content or run ads, those are costs that will come out of your pocket.
Search affiliates: With this program, you'll have freelancers or entrepreneurs pay their own money to promote your offer on search results or other online advertising platforms like Facebook Advertising. While you'll want to ensure your partner is following search and advertising guidelines, this could work in your favor if your partner has an SEO background and wants to A/B test to see which ads result in the most referrals for you — and most ROI for them.

As a publisher, you can apply for several programs and you’ll often find your favorite brands in one place. These networks usually have helpful tools that allow you to track your clicks, commissions, and more.
One of the really useful things you can do with ConvertKit is that you can tag all of the links you include in your emails. This way, you’ll know whenever your subscribers click on them and take action.