Vancouver ATM has been the outlier in volume. Massive success combo being first, media hype, huge chinese community, etc.
Robocoins in USA (austin, mountain view, seattle) have done a fraction of the volume seen in Vancouver.
I love the idea of more bitcoin ATMs. I think lower costs and a friendly legal environment are needed to make them a flourishing business opportunity.
I think part of this would be the additional AML regulations that are in the US that are not in Canada.