Does it? I thought even bitcoin had transaction fees.
Sender pays them for the most part. You can get the receiver to pay, but its unusual and dependable on the receiver actively choosing to pay, so they can simply set a threshold
It was a joke.
But you can use cryptocurrencies/blockchains to send messages, and you would use the proof of work to make sure the price is paid.
You can use messaging software to send messages and CC transactions to make sure the price is paid. Crypto/blockchain adds nothing to this scenario and creates headaches.