My picture is on my Costco card and I have to hand it to the cashier when I checkout. I’m not sure what scanning on entry does that would eliminate that step.
Again your thinking is backwards. It’s not about entirely eliminating secondary checks it’s about moving the primary check to store entry which I would guess increases the checks effectiveness and reduces the chance of rejecting sales at the register. And ultimately reducing those above costs and maybe driving more memberships.
Absolutely has a strong chance of savings.