It may be because some site can make social network from search engine like google. They can be make like yahoo-
If it does i hope it is better than G+ whatever it develops i am sure it will take ages for it to beat facebook.
Yahoo seems to be moving in some positive directions. I'd love to see them create a social network. The more choices, the better.
I also don't know, But if they make same site, it will not interesting, So must be a different idea with unique thing,
I don't think Yahoo will invent a new social network just yet. It has a lot of improvement to do to its search engine first.
We have to wait until we officially hear from the Yahoo! However, i don't think so. But, we doesn't have any clue about that.
yahoo has always had personal accounts and they have yahoo buzz which is a voting system I don't see them trying to pull something like google plus is, they see that's failing already :-"
It's possible that they will try to do that. I mean why not? Every single "website" like yahoo will have to upgrade so that they meet every single need.