#11: is Guy Kawasaki on the board or associated with your company. (serious) I wouldn't be on a start up with him; seems too willing to whore his name out for anything, perhaps I just respected his earlier days more than I do currently.
Nice questions, but any startup that claims to know the answers is lying.
1. When the company knows exactly what they're going to build, I'm going to be worried the idea is somebody's "brainchild", and that any suggested changes to the product will be met with a lot of resistance. No plan is said to survive contact with the enemy. This also applies for product concepts and the first (potential) customers. The second half of the question (Can we build it?), will always be answered in the affirmative. We're hopelessly optimistic that way.
Questions 2 and 3 are questions that are very important, but what's the point of asking when you can't tell if the answer is a realistic forecast or some numbers pulled out of nowhere? A company that has absolutely no idea about market size, or the revenue model can still stumble upon a working business model.
Questions that can only be answered in hindsight won't give you the information you need before you join.
I think the point of asking such questions is to see whether they have even thought of the difficult issues. It's not the answer, it's the thought process (just like the questions they'll ask you, theoretically).
