I don't understand the point of your comment.

You're providing a solution that doesn't fit the initial requirement of a system being trust-less. So, indeed, your solution works, but as you described, it requires trust in the administrators of the website. The idea of web3 is that you wouldn't. "Trust but verify", if you want.

This could be used for Facebook or Reddit (given that they solve or attenuate the issue of fees), where people might have less trust in the administrators.