Fingerprinting - Why cashiers ask for your postal code when you pay using a credit card

Why not only storage-based

Storage-based methods (described in my previous articles) are the best-known and the most-used methods for identifying and tracking people online. However, these methods sometimes do not affect. Users can easily turn off or clear up browser storages. Browsers also develop methods to restrict the possibility of tracking.
Device or browser fingerprinting is to solve those issues.

Read More:
https://medium.datadriveninvestor.com/fingerprinting-aba640862019