TopCashback, 5% Bonus for Payouts in Physical Amex Gift Cards
TopCashback has a 5% bonus when you choose to get paid with a physical Amex Gift Card. TopCashback usually has some kind of bonus for alternative payouts, instead of just requesting cash to be send to your account.
They also offer the same bonus for virtual Visa Git Cards. But with a physical card you can make purchases online and in-store, so it should be easier to redeem.
They also have more options that you can see here, such as 2% bonus on payments in Amazon Gift Cards, or 3% for Target Gift Cards.