I realize you don't have to answer this, but I am just curious:
It seems on the surface that our company is much closer to what you say YC is looking for, than many companies you had in W10, S10, etc. Let me just illustrate a couple points:
1. You emphasize resilience: we got rejected by YC in the past and went ahead and raised funding, launched and already have 70k (and counting) users since 3 months ago. The vast majority of our reviews are 5 stars.
2. You care about companies with huge potential. We're building a next-generation, distributed social network which gives users control over their data, and helps their social lives in the real world instead of online.
3. You want to see founders who did extraordinary things: I went to college at 14, played in Carnegie hall when I was 7 years old. (http://magarshak.com/piano) My co founder can father a small child just by looking at a woman... (http://www.xtranormal.com/watch/7203877/fundraising)
4. You care about a capable team that has been together for a long time: http://qbix.com/about . We have made websites such as this: http://blurts.com which is now worth over $5 mil.
etc.
So I am curious why YC didn't even want to interview us, but then again, your rejection letter doesn't leave many clues :)