Open yes, but Bluesky is not open, they are after free content to make the corporate investors a return at all costs. If a non-profit wants to use my server to add content to their platform, I have no issue with that. But a for-profit can pay me for content if they want it, I don’t work for them or use their platform.
Open data as in publicly accessible without a login gate. Bluesky though does have this stupid login wall option but it can be bypassed very easily so it’s still open.
I do agree with you about how Bluesky is still a for-profit American corporation and nothing free or selfless ever came from one so it shouldn’t be trusted implicitly.