This seems wrong. I don't think the average business owner has the capability to reverse engineer the anonymous tokens that represent hash IDs. Also, it's good to go in and reset that occasionally with Google. I gave up on it and switched to apple, tho. Far as I can tell, they don't ever sell that info, even in anonymous hash # form. I'm happy to be proven wrong other than "wHy wOuLd yOu tRuSt aPPle?" .
However it wasn’t clear how high quality the differential privacy algorithm was or if it was attackable. But the nefariousness of its use against groups and demographics was fairly apparent.
