u stands for unsolicited, but I'm talking about MMs that don't have their MM ID listed on the pinks for PAIM with or without a "u". What rule would stop those MMs that haven't put their MM ID on the Pink Sheets for PAIM from hitting the unsolicited bids they see on the pinks? For example if UBSS doesn't put their ID on the pinks and they see NITEu with a bid of .0011 what would stop them from selling into that bid?