Do you really think it is an MMTE problem or could it be a "let's scam people out of their money" Penson problem. There are no rules for pinks at brokerage houses.
Moreover, the reason MMTE could be on the list is because of one person filing a BS complaint. It has nothing to do with MMTE. Nothing.
TDA is is the same boat and the rest of the world, just trying to make a buck.