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people would buy shares to get a share of the future revenue of the territory and not because they think the future price at which they could sell their share increases
That's correct, as far as it goes. However, people are also funding the territory so that it doesn't get archived (until 3 mil) and an incentive to do so is receiving a larger share of territory revenues.
One other point I was thinking about is that you could make the current rent something like the interest on an amortized loan repayment. That would mean only monthly revenue beyond 100k would count towards the 3 million, which we could now think of as the principal.
The core of the idea to me is the crowdfunding and revenue sharing combination. The other elements are peripheral details that could easily be tweaked.