Is there a <a href="http://withings.com" rel="nofollow">http://withings.com</a> integration? If not, why? That seems mind-numbingly obvious. I would consider doing this if there was an integration.<p>Note that the user experience would be much better too. Rather than need to upload photos, I would just use my scale normally.<p>Also, you could incentivize the photos by reducing the amount you lose. You could lose less of your bid when you miss a weigh-in by, for example, getting people to join the service. They could then follow your progress to make sure you don't miss your next one.<p>Finally, I'd make this about a charity and only take a cut of the losses. There isn't much reason you deserve hundreds of dollars for lazy people. This might decrease the success rate but increase your signup rate.