That's only effective if you shop with cash. | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

natrius on Feb 17, 2012 | parent | context | favorite | on: How Target Figured Out A Teen Girl Was Pregnant Be...

That's only effective if you shop with cash.

ryanhuff on Feb 17, 2012 [–]

How so? My loyalty card is not linked to my preferred form of payment (atm).

bretthoerner on Feb 17, 2012 | [–]

Because as soon as you pay with a debit/credit card they don't even need a loyalty card to track your habits.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact