It's always selectively enforced!

They leave it vague because otherwise they lose their cash cow(s), but this way they get to appeal to the complainers by saying 'look, we're trying! it's complicated!'. They also don't have nearly enough 'mod staff' (lol) to actually enforce a hard rule.

I expect nothing will happen and/or one person gets a warning, while the rest of the 'scene' just continues on.