Re: I never get tired of saying it
This isn't a "cloud" problem so much as a "payment processor" problem. Even if Square hosted their equipment in their own data center, this issue might well have arisen, since it sounds like the issue was bad code. Might as well ask "How's that electronic payment processing thing working out for you?" On balance, I suspect it's working out great, which is why it's so ubiquitous (barring the inevitable commentards who I'm sure will come in to twat on about how they've only ever carried cash ever since the Great Visa Outage of '88).