An individual fedimint isn't intended to be hugely scalable, it's intended to be used by a community. What is scalable is that we could have a lot of interoperable fedimints via special invoices that could resolve to a fedi, lightning, or on-chain payment between fedimints.
Sure, but that's scalability through lots of sidechains. I think that "scalability because there's no blockchain" is not as clear.
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