Still very interesting though how they instantly knows that you have something rare in you.
math* (well kind of) and having a database of addresses that they already worked out paths to their current suggested address of current UTXOset owner
they already know that each block has 1 rare sat (first sat per block)
so they know 818k blocks creations is 818k rare sats. and using UTXO spending now they can follow that blockreward forward as it was spent over time(based on their bad economics of output path) to their suggested current holder address
there are also at block 818k a max total sats of 1955000000000000sats meaning under 1,9550,000 palindromes which they can also check UTXO spend suggested paths for current address location
*im ignoring the bad math of ordinals economic path suggestion and lack of understanding basic economics, which breaks the protocol anyways just to give a basic idiots guide to them having a database of 2,773,000 current addresses holding "rare sat"