"More precisely, what risk is going to be removed from the deal?" You've got to be joking. One of the highest risks in every startup is the team falling apart.

"More precisely, what risk is going to be removed from the deal?" You've got to be joking. One of the highest risks in every startup is the team falling apart. A team that was able to build a prototype is likely to be more consolidated than a group of people with an idea. You are weeding out the teams that disbanded while trying to build something simple, and I've seen plenty of those. I don't have the hard statistical data to prove it, but I would bet on that hypothesis.