If you get their Payboo card you don't have to pay tax. Took me like 2 minutes to sign up. They just closed the program but are re-opening it in January.

Opening a line of revolving credit, with a 29.99% interest rate, and a promise of cash back rewards that match the tax you pay (rewards which you technically are supposed to pay income tax on) isn't exactly the same as no sales tax. As as for "re-opening" the program, we'll see what they actually have for a new program when it is announced.

The interest rate is irrelevant, if you rely on it you have a lot bigger problems than ordering from Amazon.

Opening the line of credit will lower your overall credit utilization, actually helping your credit score in the long run.

Let's be serious, literally no one cares about paying tax on the rewards.

The new program is exactly the same as the old one. The backend card provider is changed.

The interest rate doesn’t matter if you use the card as cash/debit by paying it off every month. And credit card rewards are not taxable because they are considered rebates by the IRS.