Thats a great suggestion, I usually listens for some time and ask a few from my point of view meaningful questions. I usually finish off by asking them to send me an email and summarize their thoughts and to explain it in more detail.

Most of the times, the email never lands in my inbox, but when it finally does, theres usually something to it.

I've had that experience myself. Not only the same ideas pop up, but literally the exact same app name I had in mind.