There is a DMCA takedown notice on GitHub for 30 whatsapp related code repositories:

https://github.com/github/dmca/blob/...12-WhatsApp.md

This also affects tgalal's Wazapp and yowsup.

I'm not sure this is just a copyright or brand issue as they also mention "... unauthorized use of WhatsApp APIs, software, and/or services... "

Will this finally be the end of open source 3rd party clients?