1. The Price Gap Decides How Many You Own
This sounds like a small thing and it is actually the whole decision. A single Spotminders card is $39 against $45, which is close enough to ignore. But bundled it is five cards for $117, which is about twenty-three dollars each, against three Ridge cards for $99, which is thirty-three dollars each. The point is not the saving on one card, it is that at twenty-three dollars, you stop rationing them. You put one in the wallet, one in the carry-on, one in the checked bag, one in the car and one in your partner's handbag, and suddenly everything you would panic about is covered.