More than 50 companies that are members of the Merchant Customer Exchange (MCX) -- including retail giants like Walmart and Target -- are refusing to accept Apple's new mobile wallet. At stake is the future of their favored rival, CurrentC, a wallet app that will connect directly to customers’ bank accounts. The app bypasses the credit card companies, allowing merchants to avoid the high fees they pay on each credit transaction. CurrentC would also give retailers the ability to track shopping habits across all MCX's member stores, a data set that has traditionally been held by credit card companies, not merchants. Unlike Apple Pay, CurrentC relies on optical QR code scanning, rather than NFC chips and won’t be available until 2015.