Ask HN:App contests -why do you Not participate(or participate) in app contests?

Ask HN: App contests - why do you NOT participate (or participate) in app contests ? I'm looking for data and opinions on how useful and how popular app contests are with developers than others) For example, I'd be interested to know whether devs are interested in app contests like http://nycbigapps.com/ (or equivalent contests within their town or state). I'd also like to know what makes an app contest better or worse. Many govt-sponsored contests require all submitted apps to be freely available to the public (regardless of whether the app wins a prize or not). Some may require the code to be open-source. What do you think of these requirements I'd also be interested to know what people (as consumers) think of the quality of app-contest-submissions and whether these apps are useful.