This is a very low-information announcement here but if this is taken to the extreme, it means that DuckDuckGo, Qwant, and many other so-called "alternative" search engines are going to either have to look for a new provider of results, or die.
(some) alternative search engines use Bing because building an index is hard and the only project I know of doing this work from base is Mojeek: https://www.mojeek.com/
(some) alternative search engines use Bing because building an index is hard and the only project I know of doing this work from base is Mojeek: https://www.mojeek.com/
brave search, ecosia and qwant are all in various stages of having their own index