Cash and credit/debit cards must be used only for purchasing gift cards.
Naturally I was perplexed. Because what this sign says is that you can't use cash or debit cards for anything besides gift cards; the only thing you can buy with cash or a debit card is a gift card. That's what it says. And I believed it. When I asked the cashier about the reason behind this new policy, she looked at me like I was the one who misunderstood the use of only.
What the signs should have said was this:
Gift cards can only be purchased with cash or credit/debit cards.