If you are already Prime then it could be worth it. The cash back on Prime is 2.5% on forex, so effectively it is a no-forex offer (cashback is the same as the forex - same idea as how Rogers card works). You only get 1% if you are not prime.
This offering is now with MBNA (owned by TD Bank) instead of the former card offering from Chase.
Interesting. I still think the Rogers World Elite MasterCard is better for FX purchases as you get a net 1.5% back. Also, I combine this with the Meridian Cash Back credit card where I get 4% back at the grocery store. I purchase Amazon gift cards and use them for all my Amazon purchases, so again, getting 4% back on Amazon purchases.