No, that's absolute nonsense. You want people "interacting" with your instance to also be paying you?
I'm all for charging subscriptions from users of your instances. I'm all for commercial instances, but charging from people on other servers is next-level bullshit.
Seriously, I got angry just by reading this. Imagine if Verizon wanted to charge from calls made to their customers. Imagine if Google wanted to charge people that send emails to any Gmail address.
What a stupid concept, and I haven't even touched the crypto part of it.
Total user count is a vanity metric. Monthly active users is more relevant and on that we are still way off from the ATH of 2.1 million from 2023.
Also, with the nature of the Fediverse where one single person can have multiple accounts, even this metric might be bogus.