said 3 months ago:
Google+ rewards your “ownership” of your website, the articles you write, the photos you take, and the videos you make.
Google authorship rewards you for verifying who YOU are by giving you two advantages in the SERPS — by ranking you higher above anonymous content writers and producers… and by attaching your photo thumbnail to your work that shows up in the SERPs, making readers eyes choose to read your #5 ranked article BEFORE the #1-4 content without photos. People like to know WHO they’re reading… and they like seeing that 500+ people want YOU in their circle. (Yes, the number of circle followers will show up in the SERPs, too).
This will happen for all your articles AND your YouTube videos… as YouTube is part of the Google+ network, too.
Sooooooo… Google+ REWARDS you for OWNING your own website and the written and visual content YOU produce.
Facebook and Twitter rewards MARKETERS for staying ANONYMOUS and who continue to spam members and who continue to maintain multiple or even THOUSANDS of duplicate accounts through which they bombard other members with slightly reworded duplicate ANONYMOUS content.
Hmmmmmmm… do you even have to ponder who will win this game of AUTHENTICITY?