[unreal37]

You have a pocket full of credit cards, debit cards, and loyalty point cards. Every air mile you get is paid for by someone selling your purchase history to another company for marketing purposes.

It's not public for anyone to grab. You have to pay for access to the data. But if you can pay, you can get the data.

[nostrademons]

Data that can be had for a price, but not by anybody, is usually called "proprietary", not "public".