That could be hard for a lot of people, if you see other companies that adopted v4v (e.g. Leanpub) they allow people to choose down to a minimum, and they can't go higher than a given amount as well.

Do you think if Leanpub removed the minimum price in their v4v it would net positive of negative in a long period of time?

I honestly don't know and I like the way you think, I'm just stressing scenarios to stress our understanding