Related. Others?

The $5000 Compression Challenge - https://news.ycombinator.com/item?id=9163782 - March 2015 (168 comments)

The $5000 Compression Challenge - https://news.ycombinator.com/item?id=5025211 - Jan 2013 (61 comments)

The $5000 Compression Challenge - https://news.ycombinator.com/item?id=4616704 - Oct 2012 (119 comments)