What is the SEO veterans take on adding this feature to your site? Are there any case studies on buying 'likes' etc for your page and boosting SERP/Rank or is this a great way to get sandboxed?
I have never isolated just the plus 1's and/or FB likes to a page, but I have sent those to pages, along with Diggs and Stumbles, and all that together has certainly seemed to made a difference.
