Is it documented anywhere what Firefly does with "reference" images a user uploads?

 - Does it save them?
 - Is it any different than what Adobe does with contributors images relative to AI?

No answers, too bad. I'd wonder the same as you do, how they are stored and used, maybe for future training? But I think, unless there's some vetting and monitoring, some human would still need to look at each one and evaluate them.

Nothing in the terms?