A dependency does not have to look like an API.
Sometimes it looks like five years of product reviews, comparison pages, search traffic, mailing lists, and links pointing to somebody else’s checkout.
Amazon Associates made that dependence unusually clear in April 2020.
The business had already been built
Publishers and independent site owners used Amazon’s affiliate program to earn a percentage when readers followed their links and bought qualifying products. Some businesses treated that as incidental income. Others built entire publishing models around it.
Then Amazon changed the rate card.
Reporting at the time documented large cuts effective April 21, 2020. Furniture, home, and home-improvement categories fell from 8% commissions to 3%. Grocery fell from 5% to 1%. Several other categories were also reduced.
See Marketing Dive’s April 2020 report and Search Engine Land’s rate breakdown.
Amazon had not promised those percentages forever. The Associates program operated under terms that Amazon could change.
Legally, that distinction matters.
Economically, it does not make the investment disappear.
Acceptance can be technically voluntary and practically ugly
A publisher faced with a lower rate could stop using Amazon links.
That sounds like a clean choice until the rest of the system is considered.
Years of articles may already contain Amazon links. Readers may trust Amazon’s checkout and shipping. Product databases, price widgets, review formats, and editorial workflows may all have been built around the program. Search rankings may belong to pages whose commercial logic assumes that Amazon converts the traffic.
A replacement affiliate network is not a drop-in substitute for that accumulated machinery.
The owner can reject the new terms. The cost of rejection may be rebuilding the business.
Platform risk hides inside ordinary growth
This is why dependent businesses can look healthier than they are.
Traffic may be rising. Search rankings may be strong. Revenue may be predictable. The site owner may have improved every part of the operation under personal control.
One external rate change can still rewrite the margins.
The lesson is not that nobody should build on platforms. Platforms can supply enormous reach, payment infrastructure, logistics, or customers that a small business could never reproduce alone.
The important measurement is concentration.
If one company’s terms determine whether the business works, then years of successful investment have not removed platform risk. They may have increased it.