The deals tempt Karen Gunter just seconds after she opens her Facebook page: 25 percent off at Herberger's, 20 percent off at Old Navy, a free drink at Caribou Coffee.
When she clicks the links to claim the digital coupons, she automatically shares the offers with all of her bargain-hunting friends on Facebook.
"I love it," said Gunter, of Champlin, who compiles deals at CreativeCouponing.com. "Just by 'liking' Facebook pages you can find the deals. It's amazing."
There are plenty of bargains to be had on social media this holiday season, from discounts at Macy's to coupons for free panties at Victoria's Secret. But there's a catch: By claiming a discount, you end up shilling for the company that offered it.
Collect a coupon from a retailer's Facebook page, and a status update of the transaction will appear in your friends' newsfeeds. "Like" a company, and your endorsement might pop up next to a Facebook ad. Tweet about a brand -- prepare to be retweeted.
While many people are perfectly happy to make electronic endorsements or "share" an offer to save some cash, others balk at becoming part of an advertising campaign and get annoyed with the digital junk mail invading their social-media channels.
"That's not what people want on their Facebook accounts," said Betsy Anderson, who teaches social media in advertising and public relations at the University of St. Thomas.
Social-media users embrace companies that reward followers and build online communities, but not those that just pitch products, Anderson said.