Unroll.me Service Faces Backlash Over a Widespread Practice: Selling User Data

Unroll.me, a free service to unsubscribe from email lists, can scour people’s inboxes for receipts from services like Lyft and then sell the information to companies like Uber. The data is anonymized, meaning individuals’ names are not attached to the information, and can be used as a proxy for the health of a rival.

Source: Unroll.me Service Faces Backlash Over a Widespread Practice: Selling User Data