Okay, I looked at trust level info a little more and see 5 flags in 100 days gets you downgraded automatically. IMHO if it happened to you, you could ask Robin for this to be reviewed if your flags were questionable and flags were why you got downgraded. Don’t know if it would help, but never hurts to ask.
That said, it doesn’t show anywhere in the logs why @DungeonMaster was downgraded. And he has no flags.
You also have to be active to keep trust level 3. I am going to assume it was that. I found the info here…