[0xbadcafebee]

Maybe if somebody gets bored enough they'll start it as an open-source project, fund hosting via donations?

I think the key is the right vision to make it work. I see replies of "I did the same thing!" but they seem to be missing the killer feature: high-quality data. Good data (and lots of it) enables better algorithmic matching. To get the data, you need gamification. IIRC, OkCupid grew fast because bored people would fill out fun surveys, and that generated tons of data. So a big part of their site was probably just dedicated to "how can we convince people to answer all these questions and submit new ones?", and that's much harder than just creating a job board.