Pokémon Economics
A Population Report Counts Submissions. It Was Never a Census of the Cards That Survived.
PSA's population count for Base Set Unlimited Charizard #4 — 487 Gem Mint 10s among 101,739 submissions — is real and often quoted as a rarity signal. It cannot be one: a self-selected sample of paid submissions is not a census, no matter how large it grows.