I normally agree with deferring features, but in this case protecting (/preparing) yourself from this scenario is a very simple change (add a second / third pri

I normally agree with deferring features, but in this case protecting (/preparing) yourself from this scenario is a very simple change (add a second / third price point). You don't even have to do anything to support it, other than put it there and deal with it if / when that number of people do sign up.