Just came across a Website http://www.ideaexchange.com/ , that could be adapted to a Wikiproject.
On the Ideaexchange-site you can buy and sell ideas.
What would happen on a Wiki with such a built-in ecommerce mode?
How should such an IdeaExchangeWiki work?
Assuming that each WikiPage would be accessible only on a PayPerView basis and each author would get a percentage of the produced income, then some unserious authors could be attracted to provide garbage.
But isn't that the same problem that was solved by the Ideaexchange-site?
See also Wiki:EcommerceWiki