netmeg - 7:02 pm on May 8, 2013 (gmt 0)
Well yea it's possible. Anything is possible.
The site could be focusing on bringing their audience to Google+ (like for example if they're holding Hangouts that have become popular, or are specifically sharing unique content there). That's what I would do if I were specifically trying to build +1s.
Or they could buying +1s; you can probably get em cheap on fiverr.