We simply don't have enough people to form tons of clans, nor enough activities for these clans. If I understand correctly, wolfunit has made one clan. What's the point of having only one clan? I mean, what do you actually do as a clan?
Reason why MMO's have clans is that players can team up and do quests etc. Elements is a single-player game, so clan activity is very limited.
I think that activities like this should have a point. Forming clans just because it's cool to be in a clan, seems pretty pointless to me. People are free to do so of course, but unless there is a real point, I don't see why we should make anything like this official.