Amazon Associates is the more common of the two in our index: it runs on 87 websites against 76 for Skimlinks, and 2 sites use both. Counts come from real scans, not vendor claims.
Amazon Associates is an affiliate marketing program that allows website owners and bloggers to create links and earn referral fees when customers click through and buy products from Amazon.
Skimlinks is a content monetization platform for online publishers.
2 sites run both Amazon Associates and Skimlinks. That is 3% of the sites using Skimlinks, the smaller of the two.
Want to know which one a particular site uses? Look it up and see its whole stack, or compare two sites side by side.