My understanding was that patrons were not charged per usual February 1. Then normal charges would restart March 1. So yes, the month was "free" rather than the update.
I had a fascinating chat with
@Sam in this thread shortly after MrDots released the "GFYP" incest patch. Sam noted that it was a clumsy idea.
But an unofficial DMD dev-teamer--
@Jeff Steel--who also happens to be a RL defense attorney, said even the "Lewd Patcher" idea was unacceptable to TPTB (if any game seems to have thus far escaped, it is because it has yet to be reviewed). It's not that MrDots did expect to go undetected. I think he thought he could go unpunished. Massive miscalculation, that...