>How is the device not trivially trackable ?

List a few ways it's "trivially trackable".

Correlating device type & OS version, IP address and time of access is a pretty good way to connect the dots between “anonymised” IDs. If the same IDs always show up in quick succession from the same IP and device type/version chances are it’s the same person just checking multiple apps on their phone. Time of access and IP address can be used to infer where the person lives (to a certain degree or accuracy), when they are working, etc.

Yes, UNLESS you don't collect device type, OS version and IP address in the first place, which we don't.

Pierre, CEO Jumbo