SEC suspends stocks (including dark or defunct) all the time - six so far this month and 23 in April.
In 2017 they revoked these four shells that were all grey (1 revoked, 2 dissolved, 1 defaulted).
ORYN had been dormant for years. I was an unfortunate bagholder in that one at it's still littering one of my trading accounts - brokerage says they can't remove it until ordered to do so by the SEC.