Commercial payments account for 45% of total billed business at American Express, and more than 70% of those payments are business to business (B2B)—mostly driven by small businesses. American Express has a three-pronged—build/buy/partner—approach to expanding its capabilities to capture more B2B payments for its network, including noncard payments. While it continues to build in-house capabilities, an ongoing effort creates partnerships, including with accounts receivable (AR) automation companies used by small businesses in the US that are American Express card customers. BillTrust ...