Try searching Google Scholar for "social bot", or to save time, just read this paper:
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3814191
Academia has flooded the literature with >10,000 research papers based on the Twitter API feed. Virtually none of it is reproducible, it's frequently based on circular logic, the methodologies are unscientific and the conclusions are usually deeply partisan, but it nonetheless gets amplified by the media as "proof" of various false claims.
Count me in the camp of people who is happy Musk is doing this. I've been writing for years about the plague of "social bot" research coming out of academia that's based on the Twitter API:
https://blog.plan99.net/fake-science-part-ii-bots-that-are-n...
https://blog.plan99.net/did-russian-bots-impact-brexit-ad66f...
Maybe your specific work on COVID was good, but it was certainly drowned out by the work that was sharply net negative for both society and science. Academic institutions were clearly never going to get the problem under control, so booting them out whilst allowing search engines and the like to continue accessing the feed seems like a good solution.