If login tokens are stored on a public ledger replay attacks write themselves. Public or private, keeping every login token ever is a horrible audit mechanism and doesn’t scale well. At scale, speed to generate becomes a concern. Not at scale, something lighter is faster.

A normal database scales better than a license blockchain and doesn’t require extra computation to write. Audit logs and hashes prevent extra edits. License files signed by a central authority don’t require a database and the central authority is functionally equivalent albeit less expensive than a blockchain.

I am still interested in a good use for the tech. I have yet to see one that is genuine.