Q3-7 & Q3-5d get to the workability. I don't think OpenAI responds to that part of the RFC. Meta's comment on that issue seems to be fairly clear, they oppose the proposed rules on KYC for IaaS and are "not aware of technical capabilities that could not be overcome by determined, well-resourced, and capable actors".
The fact is though, every corporate actor in this entire landscape is just playing their hand. Anybody's stance on anything at any given moment doesn't mean they're more or less ethical-- the moment they perceive a strategic benefit to walling everything off which would surpass the PR cost, they will. They've probably already got PR folks workshopping angles for the press release.
This is true to a degree though there are high profile actors such as Yann LeCunn who have ethical boundaries. Yann wants AI to be open source and available to all, and he's straight up said that he won't work for a company that doesn't follow this principle. Zuck might not have a hand to play in terms of AI products, but even if he did he'd have to tread carefully because the guy that sets his whole AI direction and stewards all their research would 100% walk if he wasn't happy with the ethical direction of the company.