I can see them buying and selling into the right kind of spread
Say someone routes an order to buy a million shares at .058, and someone else routes an order to sell a million shares at .028? They'll take that spread, right? Ok, tighten it up a bit, they'll still take it, I'd guess.
Side question: on the greys, there's no way for one MM to see another MM's order book, or is there?
Regards