Currently, I assume the only thing such a postmortem would contain is "one of our anti-abuse system considered the account abusive, so our default process kicked in, some sort of escalation review process (automated or human) also flagged it as abusive, so no further escalation was allowed, and we don't really have a way to keep this from happening over and over again". (Which, to be fair, is probably true of any service that has to deal with abuse at scale.)

Anything better than that (e.g. providing notifications on takedowns, offering data take-out, or at least explaining why this isn't in place) is probably worth posting.