Naive design is all it is. Ignoring the clan requirement being another arbitrary gate, it relies way too much on the good will of others. In the same way that the rest of their game asks teamwork of people, it just doesn't work that way. People are selfish, only worried about themselves, and rarely stray from that. Multiplayer reliant games are always going to fail. No one wants to boot up a game only to be met with the realization that you can't actually enjoy it unless you play with others.