I don't know how he can say that miners earned an extra 7 BTC in that time. There's no way to tell what the market would of paid if the fees were still over 1sat/vb. Surely they would have paid more as anyone wanting to make a TX would have to have paid at least 1 sat/vb.

Unless of course it's the "ordinals" people who are minting BRC20 tokens BECAUSE fees are less than 1sat/vb. But this would just be keeping their party going a little longer. When fees are high they'll likely sell their Bitcoin to try and scam elsewhere.