This thread should be in an econ class somewhere
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You can have buyers/demand (people who need rezzes) and sellers/supply (rezzers) ... but if you can't create effective markets to link them (ie. a guild that the server will both use, and donate enough plat to, to make people actually want to join it) ... it doesn't how much of the former two things you have: it won't work.
DaP only worked because you have all three: the porters, the people needing ports, and enough plat flowing from the latter to the former to keep the system going (and keep people joining DaP).