I have the impression that most comments here are either biased against cryptocurrencies or trying to push for them blindly. That's a bit sad considering we should at least be discussing the technology here. web3 is a marketing brand that defines a future version of web apps where the frontend is a compiled SPA possibly hosted on decentralised platforms (IPFS) and where the backend is a decentralised blockchain (and…
For most people, a decentralized platform will usually be worse (speed, latency), and only very rarely better, than a centralized server. The "paying to access a database" will introduce a lot of issues both for users and developers, no matter how you implement it, for barely any user-facing improvement. And centralized processors appeared to make things easier, so you'd need a payment platform that is as least as easy and, also, that protects you against scams (AFAIK, you can't do too much if someone steals your crypto wallet or you forget the password).
So while I agree that web3 could provide identify + payments, it doesn't need to be technically elegant, but user-facing elegant.