as of right now there are a total of 27,864 total simulators, of those approximately 4500 are mainland, I don't track openspace vs full estates. So these numbers represent "Unique Regions on the grid" There was a high of approximately 33,270 a month or so ago. 27,864 is actually an increase from 2 weeks ago when there were 26,534 total simulators.

So since the openspace announcement there was a steady decline from 33K down to 26K or a loss of approximately 7K regions however total regions are currently back on the rise.