Here’s proof AMAZON IS STEALING AFFILIATE COMMISSIONS
Amazon promotes affiliates using FEEDS, yet the Amazon Feeds their software produces REMOVES AFFILIATE LINKS except for a few links to pages a person CANNOT BUY STUFF ON.
So the stripping out of AFFILIATE CODES is intentional by Amazon.
They are aware of it and until a class action is formed suing them, they won’t do anything.
Here is a page discussing the issues with Amazon Affiliate Feeds for Blog Developers.