A couple of folks have reported that Simon Gift Card purchases made with Barclaycard credit cards have coded as cash advances. Simon Gift Cards are sold at many Simon malls.
Cash advances are surcharges and are to be strongly avoided. If you set the cash advance limit on your credit cards to a very low value, there should not be a problem with this since such a purchase would fail authorization.
However, IIRC some banks will not let you set the cash-advance limit to zero.