If nothing else, this proves that Reddit admins don't fundamentally understand the platform. They may understand the back-end, and how to interact with ad servers to monetize content, but they don't understand how to effectively moderate communities. it never occured to them that they would need to scrub all the NSFW content before removing the tag?
In some places, that may even be illegal. And the Reddit admins have no one but themselves to blame, because they're the one that removed the tag without due diligence.
I've given up all hope for Reddit as a platform now. Mods should give up, too, and resign en masse. The Admins may be able to assign a few dozen of the largest subs to those power mods who are already favored by the Royal Court, but If this is any indication they have no way to maintain all of Reddit without the unpaid volunteer community they are shitting on.