Hello and sorry for the late reply guys,

I was able to gather some info contacting the exchanges individualy but by the most part the models are "Liquidity Rebates" & "Volume Discounts".

In my opinion:
The "Volume Discounts" would not work for MM but would benefit pools and payment processors.
The "Liquidity Rebates" model is interesting but its a major PITA during breakouts.


Not much information here (sorry).