Groupon Unveils In-Store Coupons for Freebies By: Benzinga via Benzinga April 10, 2014 at 09:33 AM EDT Today Groupon (www.groupon.com) announced the addition of in-store coupons to its growing Freebies category (www.groupon.com/freebies), ... Read More >> Related Stocks: Groupon Cl A