My research says Japan has several prefixes, 0120, 0800, 0088, 0531, although not all phone numbers in these prefixes are available to all callers.
In the US, holders of a toll free number pay their carrier a per minute rate (sometimes with billing increments of 1 second), as well as a fee per call from payphones.
The per minute pricing is pretty reasonable typically one or two cents per minute; I think the per call cost from a payphone are more significant, although I don't see this listed by most providers; I seem to recall it being pretty hefty (and some toll free numbers would not accept calls from payphones as a result), but maybe changes in the network and intercarrier billing have resulted in a smaller fee or it's just not relevant to most people because payphones are hard to find.
wonder what the benefits could be of the game. one is that we now know which phones are tested ok.
also it can be like a local public radio where anyone could come in and voice something...
enjoyed playing with this.
However we recently figured out how to do it in a way that won't bankrupt us, so keep your eyes peeled over the next few weeks...
They are rare, but I have already spot some in the wild.
The next night we ate whale, the next night we ate whale.
https://walzr.com/payphone-go/?phone=592
Runner Up this one playing "Im at a payphone" song
The nerd in me is just always curious about the backend :)