I think the MorphOS team should make more of a point that upgrades are free. I know it would be hard but even making a commitment like "You will get every update upto version 4 included in the price" (4 might be too high/low) would make a difference to how people feel about the price.
It would sound good value compared to certain other os's

If I was to register all my MorphOS capable hardware I would be in serious financial trouble! I've got three PegI's, a PegII G3 and five Mac minis (although one is sold and two are for sale) all unregistered.
What I could do with is a special 6 license nutters pack

My two PegII G4's and my Efika are registered though.