It's not permissionless.
Mints can even censor users: https://uncensoredtech.substack.com/p/how-to-censor-individual-users-in
So stop using mints that do this
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I don't need any mints. Bitcoin and Lightning works fine for me.
Yeah that's the thing; there's not a single merchant assorting e-cash. All the e-cash wallet users do is pay via Lightning anyway (or rather: instruct the mint operator to pay via ln for them)