This is not about patent or copyright. Amazon has sent them a C&D, and can legally choose to terminate Perplexity's access to their services if they desire, the

This is not about patent or copyright. Amazon has sent them a C&D, and can legally choose to terminate Perplexity's access to their services if they desire, the same way they can block scrapers. Now, maybe that is monopoly abuse. But monopoly abuse isn't taken seriously in America, so Perplexity's options are limited.