[hun3]

If you squint hard enough, you'll notice your bank account serves as an IPC semaphore replenishing API credit balances.

Your wallet is now a real-time communication channel.

[spockz]

There was the commercial of a bank using mobile banking as a chat system by sending 1ct back and forth and using the description.

[mystifyingpoi]

I recall some friends did that in colleage. Obviously with a bit of teenage humor in money transfer descriptions... which is not really funny, since there is no way to remove the transaction ever. Good times.