I thought they used their WoT DVM spec for something
https://github.com/nostr-protocol/data-vending-machines/pull/38
The fact that they don't use the DVM on their own website says it all.
Instead they use a normal HTTP API at https://npub.world/api/query and server-rendered profile pages apparently.
Discussion
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So what can you do with the DVM that you couldn’t do with a vanilla API? What problem does it solve?
the big promise of dvms (note the word promise), is that you can swap providers very easily. This means no vendor lock-in.
As if two API services use the same schemas.
So the ideal is a signed API response + interoperability