Yeah, you're onto something with a supply/demand/usability cycle. It'd need a new supply/demand system running in the background at a minimum, but that also introduces trying to induce demand through projects or advertisement, and I do like having more levers to pull. It'll take me a bit to implement even a simple version of this, but I can do it in stages (supply/demand, then add projects, then start mixing in other uses for the supplies.. maybe as resources to complete projects?)
At some point I'll sit down with the volunteer project manager I've been working with and put together an actual development plan so I don't get lost in the sauce on this.