Your iPhone was definitely transmitting identifiers which can be passively retrieved, via BT for example. These aren't directly tied to your identity, but announce that id-0001 was in Germany.
It's not beyond reason to guess that you stumbled into some niche ad targeting group, like "US grape juice drinkers who've visited Germany", and your old email identity was transitively linked somehow. Maybe ten years ago that email was about grape juice?
threecheese · · focus · HN ↗
It's not beyond reason to guess that you stumbled into some niche ad targeting group, like "US grape juice drinkers who've visited Germany", and your old email identity was transitively linked somehow. Maybe ten years ago that email was about grape juice?