The amount of cash back or miles/points gained is not enough to offset the headache required to get 1 tampered Visa or MasterCard Gift Card issue resolved.
Spotting Fraudulent Prepaid Gift Cards in the Wild (US Bank) –
Is the Vanilla Visa Gift Card a Scam? (My Experience) - ToughNickel
If you paid a scammer with a gift card, is your money gone? Maybe not
Nearly half of Americans don't spend their gift cards
Another Cautionary Tale about US Bank Issued Visa Gift Cards Sold at Ralph's in SoCal
BOK Financial - Visa® Debit Cards
Another Cautionary Tale about US Bank Issued Visa Gift Cards Sold at Ralph's in SoCal
Customer Warns Against Buying Gift Cards Backed by U.S. Bank
Vanilla gift card scams: Irvine woman warns about loss of $500 from Visa gift card - ABC7 Los Angeles