If AGS take control of PIK we can be more or less sure of an end to the PAX terminal piece of the operation. We can be reasonably sure that FR currently get a super deal that ensure little return for PIK. This purchase neutralises a competitor for the long run, if FR exits or transfers their flights to GLA, then standard commercial charges will apply, and if FR completely exit the void will be filled in GLA by others. Airline charges and items such as parking will go a long way to paying for the purchase price/finance. The airport most likely will take on a focus on freight and aircraft refuelling.
The Scottish government may need to take a write down in their debt if they want to get this over the line.
Ryanair also have a maintenance base their, likely this will be a thorny issue in the context of any revision of commercials?