No idea. My initial guess was because I was running long-running Fable 5 tasks related to healthcare, and I think that's within a specific classification of usage, but then why wouldn't they have suspended me earlier -- it doesn't make sense
And ban came after 6-8 hours of last session. My guess they didn’t like that I asked to verify RCE opus found, so he made workable exploit.
Everything else similar to your workflow, no token maxing and etc.