[mikeash]

Lyft receipts provide origin and destination addresses as well as the exact date and time. That would be tremendously valuable for Uber. That info could be aggregated and then sold to Uber, or their privacy policy would also allow them to just scrub these e-mails (and the manner of scrubbing is not specified, so who knows if they consider the exact origin and destination locations to be personal information or not) and sell them to Uber directly.

[ivv]

Makes sense. The clickstream data that ISPs are now free to sell would be a goldmine then.

[mikeash]

Totally! It'll be a golden age for targeted advertising. Maybe less so for the targets of advertising.