Due to Spork 10 the MN count dropped, as "old Versions" are being kicked from Payment and listing !
Make sure your MN is on the latest version (12.3) and nothing to worry about ; )
It's possible SOME MNs are being taken off line as the collateral is getting dumped in the market after a 36% pump in price.
doubt it
why would u sell an MN now with these "low prices"
look at the chart , each Version update we are 'losing a couple MN's" - going offline
they will be back when they figure out they did not receive payments due to wrong version they are running
+
200 MNs dumped on the markets would "look' very different (charts)