It's the written equivalent of uptalk[0], I wouldn't say it is uncommon at all. It would only really be confusing the first time you come across it -- like most

It's the written equivalent of uptalk[0], I wouldn't say it is uncommon at all. It would only really be confusing the first time you come across it -- like most things. [0] https://en.wikipedia.org/wiki/High_rising_terminal https://en.wikipedia.org/wiki/High_rising_terminal