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Google, Cloudflare & Cisco Will Poison DNS to Stop Piracy Block Circumvention * TorrentFreak
(torrentfreak.com)
This is a most excellent place for technology news and articles.
No competent engineer would use NFTs for the purpose. It's inconvenient, slow and ridiculously expensive. No one uses the "technology" because it's rubbish.
Implementing such a feature is trivial. Steam has a marketplace. They don't let you sell used games because the developers don't want it.