Ask HN: What are some clever/unique ways websites have used CONTESTS for promo?

3 pointsbyg801 comment

Past or present. Just wanna look over what's been done before, and/or snatch up some ideas. Thanks.

The Netflix prize was a competition for $1M to improve their recommendation algorithm. Check out ChallengePost to see current competitions offered by companies.

https://en.wikipedia.org/wiki/Netflix_Prize

http://challengepost.com/

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