What exactly is "privatekeys.pw"?

Today, I stumbled upon this bizarre website: https://privatekeys.pw/

Bitcoin Private Keys Directory

The FAQ makes no sense at all and doesn’t explain what it is about whatsoever.

What could they be referring to? Private keys? Are they listing compromised private keys to Bitcoin wallets? Why do that in public? And if so, of course whoever runs that site must’ve already nabbed any coins from the wallet anyway? So what possible use is that information to the world?

As so often is the case, I have to ask: "What am I missing here?"