>I would still need to pay for a cloud provider.

both google and oracle offer small, perpetually free VM instances.

...in exchange for knowing who you are. (If they couldn't de-dup you via some kind of identity verification, they wouldn't be able to offer a free promo, as some asshole could then just come and generate a million free accounts and lash them together to run a botnet/crypto-mining-farm/etc on.)

I believe the GP's question is "is there any public-web hosting platform that I can use entirely anonymously; where they allow me to sign up using a VPN; and where I don't ever have to pass them anything / sign in through anything / link anything that could be linked back to my identity?"

And I believe the answer to that question is "no."

(Well, okay, if you're fine with a static website, you could pin your data using FileCoin, and then set a domain up as a DNSLink pointer to [an IPFS gateway for] the relevant IPFS URN. That's how https://docs.ipfs.io works. But that's not quite what "web hosting" means to most people.)

The moment a service allows anonymous signup it inevitably gets abused the shit out of itself for spam, botnet C&C, DoS attacks and worse.

This is why I don't see how services like Mullvad can stay afloat forever.

You still have to pay for bandwidth. Free tier provides only 1Gb egress.

nearlyfreespeech.net

NFSN allows you to host websites but last I checked they won't just give you a server for you to run whatever you like.