The URL is not accessible to anyone without a seller account
But restaurants, delivery apps, Abnb, Hotels.com and even Chewy have ecards:
1. https://www.amazon.com/Hotels-com-Red-Gift-Cards-mail/dp/B01... 2. https://www.amazon.com/Bath-Body-Works-Snowflake-Email/dp/B0... 3. https://www.amazon.com/Dominos-Pizza-Gift-Cards-mail/dp/B00M...
4. https://www.amazon.com/DoorDash-Gift-Cards-Email-Delivery/dp...
5. https://www.amazon.com/Instacart-Gift-Card-Email-Delivery/dp...
6. https://www.amazon.com/Chewy-eGift-Card-Delivery-Standard/dp...
You're not an approved seller. Seems pretty clear here.