Don't think you will find them complaining too loudly ? after the other guys with the (3 ? ) A320`s stopped operating, there was sweet FA except RYR. Same situation today ? no RYR = no flights, so what do you expect them to do, ask RYR to go away as it is not sustainable ?
An airports revenue is also earned from many other sources, ( cafe's, parking etc etc ) not just the handling fees that RYR probably don't pay.