I get the idea that %95 of players are not in clans, so why prioritize it?
Suppose you're a venture capital firm trying to decide between funding Airbnb ($25.5 billion valuation, 1.5M listings) and funding TreatSpace (valuation < $1M last time I checked).
Surely Airbnb would be a much better investment, right? Since it's doing much better right now. Of course not. You'll probably get a much bigger return for the same amount of $ off TreatSpace if it does well, so you might end up picking TreatSpace over Airbnb if you think that it's going to successfully make a lot of money off the health sector.
The issue is that you can't just look at what the status is right now. Yes, the clan system's penetration right now sucks. But how much of that has to do with a lack of development (and the price tag)? I'm going to bet most of it. Fund- er, develop- it and you might start to see some changes.
I think MMB also brought up an important point- clans likely have an impact on player retention. Of course, we can't really measure that without tracking players (and ofc, even then, there are cause-and-effect issues) but I think there's a good set of reasons to believe that players who find a sort of community end up being more active than they would have been otherwise.
Edited 8/25/2015 19:19:33