Despite the unpopularity of the MorphOS keyfile arrangement (I personally have no problem with it), I think a lot of people overlook the fact that MorphOS has one of the most liberal "demo" modes available for a commercial OS: fully functional, no 30-day lockouts, no "give-us-your-email-address-and-we'll-let-you-download" schemes.
The only restriction is a 30-minute session (and it reboots in 10 seconds) - not too shabby.
And if you want to upgrade your hardware, just make sure to sell your licensed machine to someone in the Amiga community and price it accordingly. I don't think a single MorphOS-licensed Mac has yet gone unsold.