The US:CAD rate is only 4:5, not the 1:6 BTH:BCH ratio at the time of the article. Perhaps more importantly, one can only use Canadian coins this way in person, and therefore probably at very low volume. None the less, it’s interesting to see the parallel.
* And not that near, either. I’ve seen this in Massachusetts. I never saw this growing up in North Carolina, or when I moved to California, though.