There strategy did not make any sense: only a few pre-approved broad-and-shallow forums about everything instead of trying to attract niche communities from Reddit or even FB Groups.
They introduced user-created communities a few months ago. They had problems with squatting and splintering, which might have played a role in their annoucement.
Because there's no real discussion in such broad communities. Only jokes, generic replies, and silly fights. They're equivalent to comment sections on news sites.