He does answer this question:

If they discontinue the interview process because you won’t share two of the three unique pieces of information you have, then they’re extremely motivated to get a bargain on your skillset and experience, and they’re not focused on finding the right candidate for the role itself.

That’s bad news for you even if you get the job. Do you really want to work somewhere that is so myopic that they ignore perfectly qualified candidates simply because the candidate won’t make the negotiation easier?