Go back to college Econ 101 for a moment and review the supply/demand curve.  Where they intersect is the price point.  Discrepancies define surpluses or shortages.  The market adjusts pricing accordingly.  When either curve adjusts then we expect the market has adapted.
To apply this to current conditions in PHX, the supply has increased exponentially, and the demand has reduced with the season.
Observation, the market is working, new players enterning at lower donations. Established providers offering "specials"  Top tier providers managing their business, but not for me.