What's a company to do once it grabs a million merchants? Grab a million more, naturally. Following an online rollout and a wider spread to Apple Stores, Jack Dorsey's own Square is expanding to OfficeMax and UPS locations. A couple of months back, the outfit announced that it was handling some $11 million in payments per day (a wild increase from $4 million per day in July), and with the new agreements, Square payment devices are being sold at 10,000 retail locations. The hardware itself will sell for $9.99 in stores, but each buyer can redeem a $10 credit to their bank account. Beyond this?
