Why wouldn't you make something like EB W/D rate counter? It could be for example seen on any clan's wall or somewhere else. People would choose the best suitable clan for their stats and they would know if clan is strong or not by just looking at clan's Wins / Defeats rate of EBs. F.e.: I create a clan. I win any EB so counter increases to 1/0. Then I finish 3 EBs more so it becomes 4/0. Then I lose like for example 2 EBs. Counter changes to 4/2. Clans would only get people for their W/D rate.
Don't think this could yield a profit. So no, the devs wouldn't support such a thing. Wow. The recent #ihateATAbecausetheywantmoney trend has finally hit me.
If you're gonna do it the w/l should be a rolling number, the last week for example, all clans struggle to start so how would those figures help you make a decision? It would only harm NooB clans with people not wishing to join based on losses. So, no support.