저는 페이팔에서 이메일 받은 적이 없어서 몰랐는데... 저처럼 아직 모르시는 분들도 계실거 같아서 올려봅니다...

Note: As of March 1, 2022, PayPal discontinued offering the PayPal Key feature for new customers in the U.S. On April 20, 2022, PayPal will remove the PayPal Key feature for all existing customers and any new transactions using their virtual card number will be declined. 

출처: https://www.paypal.com/us/smarthelp/article/what-is-paypal-key-and-where-can-i-use-it--faq4240?app=searchAutoComplete