I've not had any difficulty justifying paying more for an app/game, thanks mainly to the 15 minute refund window.
Bad handling on the developer's part is a valid complaint alright. I'm sure it's frustrating and painful to have to support potentially large numbers of users (note: not customers) for no gain whatsoever. That, along with the obviously lacking editorial control to respond to troubled users is a glaring red flag to steer clear of the system.