[binaryorganic]

Most modern checkout experiences can identify you with very high accuracy sans-camera, so I doubt it.

[logifail]

What percentage of shoppers are already carrying the store's loyalty card and are willingly presenting it at the checkout?

What percentage of shoppers have the store's app loaded on their smartphone and carry that willing around too?

[olyjohn]

I went to the mall last week for the first time in ages. About half of the directories were replaced with signs telling you to install the Westfield shopping app, for "TURN BY TURN DIRECTIONS" through the mall. Like, really? There are only 2 walkways through the mall...