No.
1. Buckmaster contacted OpenAI first. Not the other way.
2. Giving the $1M bounty to a human mathematician for the effort and giving him credit would be excellent PR. They had already burned much more than $1M for the generation. Adding him as author also costs nothing. Purely pragmatical.
3. “As long as he removed Alpöge” part itself is against academic honesty by all means.
4. Buckmaster rejected fame and $1M only because doing (3) would be wrong. That’s a perfect example of honesty. That can’t be overstated.
5. After the rejection OpenAI guy (Sebastien) did’t say, “ok bye”. He threatened Buckmaster to “end his career”.
6. At that point OpenAI was not sure if they really used his conversations in their proof. He basically wanted to buy him to control any damage.
7. They omitted Buckmaster’s published work and any other related work in their References section. Also an academic malpractice.
If you see generosity and niceness in all of this you are either too naive or your name is Sebastien.