I tell you one thing, it wouldn't surprise me if grounding aircraft domestically in recent times has actually improved the bottom line.
Interesting to note also that (possibly) apart from a couple of 'on the market' 73's at Avalon, 7 individual aircraft have not been grounded for the entirety of the period mentioned.
Lines of Flying have been cancelled involving any number of aircraft, possibly simply to improve the load factor with the added benefit of appearing to be caused by lack of maintenance action due to the engineers lack of cooperation.