RSS Amplify disrespect the licenses of the website owners and serve the content without further addo.

Translation: If your bot or scraper that is being denied access to website A, RSS Amplifier will re-publish material from website and give your bot or scraper full access.

The main issue is they are not a mirror, but share their own feeds. They are a directory, but they provide all the content.

RSS Amplify is a website stealing content from other and generates revenue based on the data retrieved.