it's really mind boggling to me they take $1 at all. Why? Banks have a myriad ways to make money instead of taxing consumers (and overwhelmingly the small fish). It's 2019 and cash has 0 cost to transfer.
In the UK, the Faster Payments Service enables near-instant transfers (usually a few minutes) that are typically free to the consumer. This network has been operating for more than a decade.
[0] https://en.wikipedia.org/wiki/Faster_Payments_Service