perhaps it's how I am, but if I'm not interviewing with people who are part of the company, how am I supposed to make judgements about whether I want to work with these people?
I can actually see a need for this, but they need to get more experts than "our mates from nearby startups and their parents."
Also the subjects they've listed are all for programming topics when I doubt you're going to be in the situation of not already having some in house experts. They need much more niche subjects.