More details about Starbucks' (SBUX) partnership with Square: 1) Pay With Square will be added to Starbucks' barcode-scanning apps. 2) Starbucks loyalty cards (25% of transactions) won't be affected. 3) The deal is U.S.-only (Square hasn't gone international) 4) ~1M people/week use their phones to help make Starbucks purchases. 5) Starbucks was approached by every other mobile payments firm before picking Square. In addition to Verifone, eBay (EBAY -1.5%) is trading lower.