As of 12/9/2018 at around 1pm EST, I was sent a message in-game stating that I was banned for 40 years. The only part of the trainer I used was the credit tool. I used it once, like 2 months ago, on the fresh save file, and that was it. They are maybe retroactively banning accounts. I have never used the auction house on this account, or attempted to use other parts of the trainer while online. No- I didn't do anything wrong using the trainer. A common theme I've seen here is to blame the user. I accept all repercussions of cheating, but nothing ****es me off more than retroactive bans.
It could be that I was banned from online play a long time ago; I never play anything online, so I don't really notice. However, I did just start the game and notice that I don't have the option play online (greyed out), so there's that.