Have you never heard of rare sats, runes, ordinals?
I'm sure he did, so did I. It's just that Bitcoin is fungible and there's no such thing as "rare sats". It's made up BS for those who want to believe in things that are diametrical to what Bitcoin stands for.
Runes is probably a less spammy version of some sort of "protocol" to create silly tokens or whatnot on Bitcoin blockchain to rip off gullible souls. And the spam fest of BS ordinals is another crap not very much appreciated by Bitcoin purists.
It's your thing if you enjoy this shit. I explicitly don't thank those who engage is this and bloat the blockchain.
Testnet is for testing and should be without value. Reality is a tid bit different.
And if testnet.ordinals.com doesn't know about or can't switch to Testnet4, guess what, who's to blame?