Geosync orbits have a de-orbit requirement (at least US operations do). So they have to keep enough fuel to go into a higher orbit after their lifetime. This

Geosync orbits have a de-orbit requirement (at least US operations do). So they have to keep enough fuel to go into a higher orbit after their lifetime. This wasn't always the case but it is now. Also Geo orbit (while popular) is only useful if you get a fairly large degree of it all to yourself. My current understanding (correct me if I'm wrong) is that most satellites operate at fairly large distances from each other in Geo about 0.5 degrees apart is normal. Mostly because the antennas sending signals from have a wide beam at the point they hit the satellite and affect adjacent satellites. So they have to distance the Adjacent satellites far enough apart so as to be effective in communications. This isn't a problem for different frequencies, so you might stack a K and C band satellite on top of each other. But most of the Geo beasts have full capacity for the spectrum they are legally allowed to use. Also, I'm speaking strictly about COMM satellites. I haven't done any practical application on anything else.