On some of the airports, it won't let me select the number of gates to rent (i.e. Lubbock International Airport)
I just went to rent gates, countries, United States, Lubbock, Texas, and I clicked rent. The map showed up, along with the details of that airport, and below that was an ad, and I saw no box with the rent gates option.
However, I went to Dodge City Regional Airport, selected Rent Gates, and the box WAS there.
My airline is Go! Air (GOA)