http://www.merchantadvisorygroup.org/home
The Merchant Advisory Group (MAG) was founded in 2008 by a small visionary group of merchants in the payments field dedicated to driving positive change in payments through multi-stakeholder collaboration. Today, the MAG represents over 100 of the largest U.S. merchants who account for nearly $2.6 Trillion in annual sales at over 430,000 locations across the U.S. and online. Roughly $1.5 Trillion of those sales are electronic representing over 41 Billion card payments. MAG members employ nearly 11.5 million associates.