That was on my to-do list for future features. I shipped it very early, and Amazon demonetized me pretty soon after that, so lots of things I wanted to do became useless.
I'd looked into it as an expansion in the future. Currently my data set was built strictly on Amazon links, so expansion would mean a rebuild/reindex of all reddit posts.
The skimlinks JS code automatically rewrites any links within their affiliate system, including amazon. I only suggested it because you'd only need to copy/paste a few lines of code to rewrite everything.
I'm using skimlinks with my project and it seems to work pretty well, though it does take a while to get paid.