This means offering the right tools to help companies and freelancers make educated decisions (rating systems, reviews, programming tests, etc). It having dedicated staff to vett programmers and companies.
Specifically in terms of the Blub paradox, I can say that sabalaba and I have used a myriad of different freelance services and have a pretty good idea of the services they are missing. If we are able to curate and nurture a ecosystem with better hackers than any of our competitors, I'll feel proud that we've been able to at least offer our clients a superior service.
I really appreciate your points and I admit this is something we're going to simply have to prove. That's why we're not earning any commissions for our first batch and are keeping our network small enough that we can resolve problems one at a time.
cheers, Zack!