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.
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I thought they used their WoT DVM spec for something
GitHub
Web of trust related DVMs by franzaps · Pull Request #38 · nostr-protocol/data-vending-machines
We have been working on a few different web of trust services that, as of now, are fully operational.
We are starting with this draft spec and woul...
bullshit, we use the DVM.
query: https://github.com/vertex-lab/npub.world/blob/main/src/lib/relay.js
searchDVM: 
profile:
GitHub
npub.world/src/routes/api/query/+server.js at 184127e5250c241694b245d9822532ee190c48ea · vertex-lab/npub.world
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GitHub
npub.world/src/routes/[npub]/+page.server.js at 184127e5250c241694b245d9822532ee190c48ea · vertex-lab/npub.world
Contribute to vertex-lab/npub.world development by creating an account on GitHub.
You can talk all day, I have the screenshot, and screenshots never lie: 