https://oag.ca.gov/news/press-releases/attorney-general-bonta-exposes-amazon-price-fixing-scheme-driving-costs

TL;DR - Amazon forces sellers to raise their prices everywhere if they raise their prices on Amazon.

"In other words, while consumers face a crisis of affordability, Amazon blatantly worked to ensure that consumers could not find cheaper products out in the marketplace... The new evidence uncovered shows that Amazon's agreements to raise prices are typically implemented using one or more of the three price fixing schemes below"

Analysis of the whole thing at
https://pluralistic.net/2026/02/25/most-favored-nation/