Quote from Option Trader:
As an alternative, maybe it's not the broker, but MM's or specialists selling options who can identify you as a retail client of whatever brokerage, and want you to "give up" your place in line.
MMs rarely will hit/take a retail order that is resting on the bid/offer unless they really need to balance their position, or it is mis-priced (i.e. the underlying moved or there was a change in the greek profile). In that case, I doubt very much that they care who is on the other side of the trade.
If I'm bidding/offering, the only way I expect to get filled is in the above case, or if another retail order attempts to hit/take the bid/offer with auto-ex turned on, and I'm first in line. Those retail orders are often for small/odd lots (e.g. 1, 3, 5, 6). This happened to me pretty routinely when trading options from the bid/offer. Partialling me doesn't change my priority, either, unless I change the order.