I wonder how this type of system would get paid for. If we're all paying for our private clouds and we use this 'Distribugram', who pays for server to server tr

I wonder how this type of system would get paid for. If we're all paying for our private clouds and we use this 'Distribugram', who pays for server to server transfers? Is it free to the users (handled by provider peering/transit agreements)? Do users pay? Puller or pusher? How does this impact people with many followers/followees? Do they pay more? Thinking about this, I wonder if the economics would work given the ad-supporter/loss-leading aspects of some of these services. Still, interesting.