Kind of sad how they get in a consultant and then won't listen to what he had to say. Apart from that: How could you protect yourself from not being mislead fr

Kind of sad how they get in a consultant and then won't listen to what he had to say. Apart from that: How could you protect yourself from not being mislead from the first sales through people personally known to the founders? They might tell their friends etc., when could you assume that they buy it not through a certain personal link?