I compare this with my recent experience with OmniGroup’s OmniPlan 2.0 upgrade. Their pricing model insures that I will be buying the new upgrade via their web site instead of via the Mac App Store. When contacted @OmniPlan’s twitter account was sympathetic, “That would definitely be nice. Unfortunately not much we can do with the current App Store policies.”
The Mac App Store needs a model for alternate channel pricing, upgrade pricing, and license conversion. Apple is not likely to move on these items anytime soon. For channel pricing Apple has come out with volume discounts for enterprise buyers. Without a paid upgrade option software vendors will be force to release new titles rather than update an existing brand. Will there be a BBEdit 11 or will Bare Bones have to come out with BBEdit HD?