🔗: https://on.wsj.com/43Qlp5A For Marriott, the $15 million licensing agreement with an upstart short-term rental company called Sonder seemed like a low-risk way to add 9,000 rooms to its global portfolio. Marriott customers, who earned loyalty points by booking Sonder units, liked the option of with hotel amenities at apartment-like units enough that a few thousand were settled into Sonder rooms on Nov. 9 when a puzzling email arrived from Marriott: “We are kindly requesting that you check ou