Daily reminder that it used to be the case where you could put down a POB, forget about it, and it would take a year to decay and die.
So of course POBs are decaying now and lots of them. These things have existed off a hugely lenient degree of life support in the past and now actually require you to supply them in order to maintain.
What this statistic indicates is actually the sheer excessiveness of how many POBs had been built over a long period of time when POB management was effectively a passive activity. The end result you're actually going to see is a smaller number of actively run POBs rather than dozens with no purpose or signs of life.