SAN FRANCISCO -- Groupon is getting into coupons, a big shift in its business model and a challenge to RetailMeNot, a leader in the online coupon sector. Groupon unveiled Freebies on Wednesday, a new ...
Web site RetailMeNot is a search engine populated by users with coupon codes for online web sites. Basically, RetailMeNot aims to be a central repository of codes you can enter when you check out at ...