G+ is just a spying exercise for Google
G+ may not have been embraced by users, but anyone who has a Gmail account or a YouTube channel, will have been using it and sending very valuable data to Google - it might not be a decent social network, but G+ is proving to be an excellent surveillance tool for the internet giant.
Plus is, in essence, all your accounts rolled into one, so Google know who your mates are through your emails, sees what you're putting into their Maps and observes everything you do through their services.
If they want to woo advertisers, then this data is gold dust. And they're getting loads of new sign-ups too. Want to comment on a YouTube video? It is mandatory that you get a G+ account. This, naturally, has set alarm bells ringing for people with antitrust concerns.
Even the Federal Trade Commission are looking at the whole thing suspiciously.
Now brands and companies are being dragged in, with Google offering packages which involve 'prime placement' in Google Search. Basically, if you want help with your SEO, then use Plus because you'll get better placement than if you spend all your time with their rivals. WHICH ISN'T ROPEY AT ALL.