I was told mm were not acting on orders to buy.

I was told mm were not acting on orders to buy. So I tried to buy 1m@0.0001 yesterday (am -close). Not only did they not show my bid, they didn't fill the order either. Very scary when a mm won't even attempt to fill an order. There was certainty a lot of shares showing on the ask matching my bid, but no fills. I won't being trying to buy today or any other day from here on out.