This letter smells like a perfectly executed disinfo op: throw in some big names (with fake signatures), real people who don't recognize the con sign it, let it snowball, make the news cycle, remove fake names...

Ask: who benefits from this? Google & other big corps who are falling behind. Or China

https://www.theinformation.com/articles/alphabets-google-and-deepmind-pause-grudges-join-forces-to-chase-openai

https://www.technologyreview.com/2023/02/15/1068624/chatgpt-race-china-baidu-ai/