Quote from EvOTraderV2:
eventually all the exchanges will offer a premium (pro) subscription for those that need the most reliable data. It takes a very serious investment in infrastructure to provide real-time quotes when demand is growing.
I suspect they will all have prop/professional fees for those that use more data for the same reason the cell phone carriers no longer offer unlimited plans. In this case, those using the least amount of data are subsidizing the heavy users and that can only go on for so long with these algos sucking up data at the speed of light.
the only certain thing in this industry is fees will always go up.