As I read the comments (not watched the video yet) where people are discussing the misaligned incentives of both the ice cream machine vendor (Taylor makes money on maintenance) and the McD franchisee (ice cream is a loss leader), I was reminded that a convenience store chain here in Utah has a self-serve shake machine (I forget the brand name) that has always been broken when I thought I'd try it out.

I asked my wife, who goes to Maverick every day, if my perception that the shake machine is always broken was accurate and she said "yes. I've never seen it working. I've always wondered why they keep them because they just take up space."

Fwiw