If you are in the US, you can use Skimlinks to monetize Amazon links, but there are certain types of Publishers that they prefer not to work with.
Unfortunately, since 2018, Amazon EU does not allow European publishers to monetize Amazon links using automatic link tagging tools. This is something we hope will change in the future. However through our partnership with GeniusLink publishers in Europe can still monetize links to Amazon and earn commission on referral sales.
You can read more about our relationship with Amazon in this blog post.