Would Proof of Work (PoW) captchas be a step up from this issue?

I understand not everyone agrees with Brave’s underlying infrastructure, but I think we can all agree moving towards the latest version such as Google’s reCAPTCHA v3 isn’t exactly our best bet either. I’d much rather not resort to biometric, email/SMS, or centralized social media authentication.

I’d love to see how Nostr can replace this spam filtering system with a more privacy-centric focus approach.

Maybe a Cryptographic Authentication Protocol to tell Computers and Humans Apart?

Or

Proof of Work Authentication to tell Computers and Humans Apart - aka

PoWACHA using our cryptographic identity from Nostr to sign & pay a minimum of a certain threshold (n) sat fee on the Lightning Network as proof of work.

For anyone reading this.. is this feasible? Could Nostr actually fix this?

https://search.brave.com/help/pow-captcha