Shit, I traded hundreds of GME puts today, if not thousands. Still have a lot of orders in but I guess play is over.
Though I don’t think MMs have anything to say in terms of IB and vice versa. MMs trade with exchanges, while all brokers simply submit orders to exchanges.
Unless the ban is at the exchange level.
I also traded some puts today early in the session and they went through without issues, but suddenly, trying to place one order only to get the message that the contract is only eligible for closing, no opening. Tried a couple of puts across expirations, all the same. Calls are fine though, open or close positions are allowed.