[puls]

When you open a tab, your name just shows up next to the "charge a card" button. You pay when you normally would. It's not really breaking the normal purchase loop so much as removing all of the crap from it.

[holman]

So you open a tab prior to going to a place, and then the retailer sees all of the customers with recently-opened tabs?

[puls]

Yep.

[holman]

Cool, that makes more sense. I'm satiated!