AMEX is considering broadening or deepening its social media strategy. Broadening would involve building partnerships with additional social platforms to provide unique experiences and offers to customers. Deepening would focus on improving customer and merchant acquisition and retention through existing partnerships with Facebook and Foursquare. Some risks of broadening include negative comments, choosing the wrong platforms, and account hijacking. Deepening risks include not all countries using the key platforms and issues with over-reliance on only a few partners. The document discusses potential benefits, opportunities, and risks of each approach.