paying a royalty is not permissionless, and thus not a digital artifact.

- Digital artifacts are uncensorable. Perhaps you can change a database entry
  on a centralized ledger today, but maybe not tomorrow, and thus one cannot be
  a digital artifact.

- Digital artifacts are immutable. An NFT with an upgrade key is not a digital
  artifact.

The definition of a digital artifact is intended to reflect what NFTs *should*
be, sometimes are, and what inscriptions *always* are, by their very nature.