Thanks for your supporting comment and good luck with your business! Besides the money more of an issue was possible distraction for us. We are 3 co-founders. For us all going there would mean several hundred hours of flight and travelling. So we made the decision to only send one person (after consulting with Y Combinator).

However we should point out that Sven & Alex were on stand by via Skype during the interview to answer any possible questions that might have come up.