Why would anybody pay 4M sats on lightning though? I'd simply go on chain for that

1% doesn't look so small when payments increase. That's why Visa, Mastercard and Estate Agents all make a lot of money.

Isnt floppy against LN? If yes, he can just fake that shit, what he perhaps did... Because usualy you set a fee limit, isnt it?

if you got many hops and a bad software it can get pretty expensive, one more argument to run your own LN node

Not many details... 🤷‍♂

I would guess that's just a fee reserve right? Not the actual cost.