Isn't a parallel (and perhaps even larger?) market that of users of a system or library that might be willing to put a bounty on having a feature prioritized by the maintainer(s)?
With that in mind, could you use a variant of the same system to put a bounty on issues/tickets being resolved?
I don't know how to (in general) solve the problem of developers at large enterprises taking advantage of open source developers that are barely making ends meet. Nor the problem of developers being demanded to fix bugs or add features for the benefit of people who aren't paying anything for it -- but maybe this could be a start?
If I understand what you're saying, we made an open source offering based on our current model: http://codemill.io/for-open-source is that what you're after?
With that in mind, could you use a variant of the same system to put a bounty on issues/tickets being resolved?
I don't know how to (in general) solve the problem of developers at large enterprises taking advantage of open source developers that are barely making ends meet. Nor the problem of developers being demanded to fix bugs or add features for the benefit of people who aren't paying anything for it -- but maybe this could be a start?