This is from the current Pricing and Terms for the Amazon Rewards card:
“Your due date will be a minimum of 21 days after the close of each billing cycle. We will not charge you interest on purchases if you pay your entire balance by the due date each month. We will begin charging interest on balance transfers, cash advances, and overdraft advances on the transaction date.”
I was only able to find one review from 2013 that said anything about being charged interest from the date of purchase, so I’m skeptical. There are scenarios where you could end up paying interest from the date of purchase but it shouldn’t happen if you pay your balance on time and in full.
I’d suspect it might be that if you’re carrying a balance then the grace period isn’t offered on new purchases. Just a guess though.
Those reviews are clueless people. No such policy exists. It is a normal Chase credit card. When you pay the min balance on any credit card it charges interest on all new purchases from day of purchase. Dont carry a balance. Amazing that in 2017 people do not understand credit cards or personal finance.