There's yet another concern, which they haven't mentioned, and it's that ChatGPT has become a bit of a generic trademark, with a lot of other services launched over the last few years promoting themselves as a "chatgpt for X".
Also a problem, like what happened to Xerox and Kleenex.
And another... Few people connect ChatGPT and OpenAI, and there's nothing open about it, so strange branding all around.