Sahil Lavingia of Gumroad – The Future of Flexible Companies
parttimetech.io
parttimetech.io
Oh, and found this articles: http://www.vintagedigital.net/content/setting-software-co-op and https://www.scribd.com/document/26587085/Tech-Coop-How-To
And also the Hacking Business Model proposed by Monty from MySQL fame was similar to the coop model: https://www.forbes.com/sites/reuvencohen/2012/07/25/the-hack...
My prediction is that we will start to see more over the coming years though. Whether that means finding creative ways to share equity/upside, or using more contractors and part-time folks.