The two giants finally reached a truce in . As part of the agreement: Amazon bans sellers from selling Chromecasts : r/google
The disappearance of Chromecasts from Amazon began in , when Amazon famously banned the sale of both the Google Chromecast and Apple TV from its site.
: Critics argued this was actually a tactical move to protect Amazon’s own Fire TV line, which competed directly with Chromecast.
The short answer is that , though that wasn't the case for many years due to a high-profile corporate "cold war" between Amazon and Google. The Story of the Streaming War
: In 2017, Google fired back by pulling the YouTube app from Amazon’s Fire TV and Echo Show devices, citing a "lack of reciprocity".
: Amazon claimed it removed these devices to "avoid customer confusion" because they did not natively support Amazon's Prime Video service.