Facebook Offers allows for social buying, meaning that if one person "claims" a coupon offer posted on a page they already follow, people to whom they are connected on Facebook automatically see the offer associated with a friend. Like social advertising, the offer reaches an expanding group. 

The campaign is working hard to leverage Facebook as an important part of its social media strategy, and the effort has paid off recently in an upward climb in Romney's number of Facebook fans.

Romney supporters seem especially to enjoy seeing pictures of the presumed GOP nominee and his family. Romney got a huge number of "likes" — over 53,350 — on an Independence Day photo with the caption: "Some much needed family time this week."

That's more likes and shares than on most of the other recent items on his page, including his response to the Supreme Court's ruling on a healthcare reform act that is hated by the majority of his conservative voting base.

Updated at 10:36 a.m.