The reason I took those supermkt cards out of my wallet is cos I don't like carrying a fat, heavy, wallet, which is uncomfy in a pocket, etc. So putting them back in with RFID shield things would be even fatter, etc. The little key ring things are the same, but worse, cos they don't even lie flat in a pocket (until they break or get lost). I could put them on my phone, and then it makes sense to pay by phone too – but then that requires turning phone on, finding correct wallet app, activating it for payment card, activating it again for loyalty card, ect, ect. #fwp