It's way simpler. No matter how many Hercs and jets in the circuit you have, you CANNOT balance the books with an empty 1960s built transatlantic terminal standing mainly empty.
All the great effort on the non sched and cargo front is ****ed up against the wall by trying to compete in the scheduled passenger market with the albatross of costs on a monthly basis killing you. PIK might make money if they shut the terminal, sold the land and put in a smaller facility around Apron G for say occasional trooping flights or local GA airliners.
Airport stays open, local spotters continue to spot and Ryanair still pop in for maintenance (depending on deal made.....!) But doing the same stuff you've been doing every year since it all went wrong and expecting a better result is bonkers.
Question remains. Who would fly pax out of PIK in enough volume to cancel out losses? I am going to say no to :
FR, (golden days not coming back)
TUI, TCX, LS, EZY all focussed and doing well at GLA
MON might give it a go but FR would try and kill them off