We added an option to the editor to add commerce insets to an article.
You can add any kind of commerce inset by using the cart button in the toolbar.
It will add a commerce button to the article. You can set the URL and the text of the button.
The button itself looks like this:
When you use Amazon links it automatically changes into an inset that ensures that G/O Media is marked as a beneficiary of commissions. But using the new commerce inset you should be careful to insert a link that already includes partner information.