Google Social Networks?
Yahoo backs Google's push for open social networks
Yahoo said it is backing a program by rival Google to make software work fluidly across different social networks, and will create a joint foundation to promote the effort.
Ref. https://www.stuff.co.nz/4452787a28.html
Google's sees room for several social networks
Google is leaving open the door to more co-operation with social-media giants Facebook and Twitter, and believes there is room for multiple social networks as it rolls out its own, executive chairman Eric Schmidt said. Ref. Source 4
Google has tried to do many web projects and ended up closing them. This is one of those that has not been successful. The way they have their communities setup is confusing and could never outclass Facebook which has become a standard now.