You're really asking two questions here, I'll attempt to answer both. The first question is: Why are big clans dying? The simple answer is they aren't. Three top clans have died this year (four if you include RR, formerly top) but that isn't the problem. People had real life obligations, it happens all the time. It just happened to be top clans this year that suffered from it. I think the real issue is that the places of the top clans that have died aren't being filled, and that leads us to your second question. Why is there no new blood (or very little) coming into the clan world? The clan world just isn't appealing. Small clans, maybe...but once you get to the world of top clans you're basically expected to lose millions of gp a week and return for 16 hours straight pointlessly dying all for some "victory post". For experiences clanners, perhaps they enjoy it, or at least can stand it. However, to the outsider, there's nothing appealing about it.