Yeah, CWA is dead because of three main reasons imo.
1. Cheat clients.
2. Clans only allow their best members to participate. Instead of trying to pull as many as they can and then sitting to match opts like the old days, they just tell you not to bother showing up if you're not 100+ combat with maxed gear.
3. Lack of interest, which stems from point #2. Hypothetical situation: I'm new to the pure scene and I just joined my first clan. I have a maxed 1 def 60 attack pure and I want to participate in CWA. My leaders tell me my account isn't good enough, I need to train defence and attack. I need to "ruin" my pure to participate. No thanks.