So, essentially, it's the same as Paypal's free personal transfers, just done through email with a after-the-fact confirmation. Shrug. I'm doing fine with the paypal app today.
Guess I'll have to find other ways. I am surprised that Square didn't at least send out invites to their current customers. Funny I had to read about it here.
Most people don't go out of their way to tell everyone things are "just working".