I will say that I, as a physics student, mentally crunched the numbers in my head when I saw a recent Wired article. It said:<p><i>Consider the action around Apple’s iOS alone: Since its 2007 debut, 500,000 applications have generated $3 billion for developers. (Android’s 400,000 apps have earned around $100 million.) ... It costs $5,000 to throw an event for 100 participants—a tiny investment considering the payoff if a participant creates a blockbuster app that the company can market... At one hackathon hosted by an upstart open source platform, I watched the winning team hoist an oversize novelty check for $10,000.</i><p><a href="http://www.wired.com/magazine/2012/02/ff_hackathons/" rel="nofollow">http://www.wired.com/magazine/2012/02/ff_hackathons/</a><p>If your mental math is good, you'll see those first numbers as 2 x 3000 and 1000 / 4, or $6000 and $250 respectively, in average revenues per app. So, I'd anticipate that Android can't really motivate a hackathon. Also there is some level of bias because really bad ideas might get filtered by the hackathon system, so that perhaps you are automatically in the top 10% of apps and your expected value is instead much higher, $60,000 or so. I doubt that it's quite this high, though.<p>Do they keep all of the submissions, or just the one that wins the prize? Because it sounded like they had 5-person app teams in this contest, and 100 people could potentially create 20 successful apps. If you got to keep all of them, then that's 20 * $6,000 - $5,000 = $115,000 expected profit before paying the programmers. Giving $10,000 to a single winning team is actually pretty absurdly conservative -- "you do all of the work, we'll keep over 90% of the profits." They can maybe get away with it because we think of ourselves as winners and splitting it up among 5, $2,000 is not bad for two days lost. Then again, assuming that everyone else is as good an app designer as you are, your expected value is only $2,000 / 20, and $100 is actually a pretty pathetic salary for that sort of competition. I mean, I know that you're "doing it for the love" or summat, but still, it sounds like these hackathon hosts have found a way to make programmers work for peanuts.<p>Unless when they said that the <i>team</i> hoisted "an oversize check", they mean that each member of the team hoisted an oversize check for that same amount. Then the profits are a little closer to 50/50 split (which is still a bit crazy) and the expected profits of your 48 hours of work are $500. Is your overtime rate $10/hour? ;-)