I don't think incentives should be created and awarded to developers of open source work. That will only attract more of the type of coder you don't want developing open source code, causing a reduction in quality.
People work on open source projects because they are driven and motivated by the challenge of creating great software that lasts, the mastery they develop while doing it, and the fulfillment and satisfaction of making a contribution to the community of fellow hackers.
People work on open source projects because they are driven and motivated by the challenge of creating great software that lasts, the mastery they develop while doing it, and the fulfillment and satisfaction of making a contribution to the community of fellow hackers.