[dark_void]

"The judges will select three winning teams, one for each of the three nonprofits that participate. Prizes will be given to the nonprofits themselves so that each of them can implement the winning idea devised to benefit their organization."

The winning teams get nothing? Is this common for hackathons for nonprofits?

[chrisallick]

I don't think there are any rules to how a hackathon is conducted, but transparency is best in all things. The people participating know very well that they are doing so for the experience, exposure and out of goodwill.