They want Buckmaster to dissociate with Alpöge in a follow-up rewrite of OpenAI's work. (They only publicly admit “Buckmaster as the lead author”, but judging from Buckmaster’s statement, it’s pretty clear that don’t want Alpöge at all.)

Just suggesting to a mathematician to dissociate with their collaborator for a follow-up work, because their collaborator “is inappropriate to author OpenAI’s work”, is completely against the norm of mathematical research. As charm137 puts it in a comment below:

> This is like a researcher from CMU saying to an NYU researcher that their collaborator, being from MIT, is a problem - this is as ridiculous as that!