It is possible to supply spacecrafts in orbit in cis-Lunar space with oxygen from fuel production facilities on the Moon or on asteroids. What is the size of this potential in-space oxygen market today? I would like to see estimates of how many active satellites there are in orbit and how much oxygen fuel they together consume for station keeping and other maneuvers after orbital insertion. And how much is lost by leakage if that is a relevant quantity. Especially for geosynchronous orbit separately since it is relatively easy to reach several satellites in a single supply run there.
I suppose that the space station consumes a significant fraction of all fuel in space because of its great mass and the atmospheric drag. Water and breathing oxygen for the ISS crew would also be part of the market demand.
Since it is oxygen that would be supplied from in-space, I'd like to see estimates of how much oxygen is consumed in relation to other volatilities (such as hydrogen, kerosene, hypergolic fuels, solid fuels, cold CO2, xenon, helium, whathaveyou).