To whom would they pay 'rent'? What would be done with the money?
Don't go there, it leads to nothing but more waste, abuse and corruption. If it becomes necessary there can be some form of arbitrage in how LEO is used, we're not there yet though. Maybe something like the auctions for bandwidth for mobile operators but again, where does the money go? If institutionalised it will just turn into another slush fund for whatever interests, many of them corrupt or nonsensical, to drain.
> like the auctions for bandwidth for mobile operators but again, where does the money go?
Doesn't matter. The entire point is price discovery and fair allocation. Once the resource has initially been allocated, you can allow resales, but without an auction, how would you determine the initial price?