From Paul Graham's Twitter, three days ago: "No one in the world is better than Sam at dealing with this kind of situation." Jessica Livingston retweet: "The reason I was a founding donor to OpenAI in 2015 was not because I was interested in AI, but because I believed in Sam. So I hope the board can get its act together and bring Sam and Greg back." Also from a sibling comment: https://twitter.com/search?q=from:paulg…
In the case of YC, removing him was better for PG and YC.
In this case, having Sam on top of OpenAI gets them better returns on their investment.