[duskwuff]

> Hell, some of the internal skimmers just solder jumper wires to pcb pins/testpoints don't they?

No. Most modern card terminals are tamper-resistant and will erase key material if opened.

(Besides, it's not like you're going to be able to casually crack open a payment terminal, pull out a soldering iron, and modify it while you're standing in the store checkout line.)

[delfinom]

Payment terminals inside a retail store do have that tamper magic.

Gas pumps are a little quirkier because they use integration modules, I would imagine they got better with newer ones but earlier ones, even with chips, would basically just be an exposed pcb on the inside