一早收到这个邮件，5x还不错，但可惜只有600刀的上限，比discover的还少。
using PayPal for online checkouts is fast, secure and rewarding! Activate this special offer by 9/15/2022 to start earning 5 Bonus ThankYou® Points per $1 spent - up to 3,000 points total - in addition to what your card normally earns on eligible PayPal purchases with your linked Citi® Card through 9/30/2022.*
*This offer starts 6/30/2022, or the date you enroll, whichever is later, and will end on 9/30/2022. Earnings associated with this program will be awarded as 5 bonus ThankYou® Points per $1 spent on eligible PayPal purchases. Where applicable, these bonus ThankYou® Points will be awarded in addition to whatever normal rewards your card would earn. This offer may overlap with other special offers in which you are currently enrolled. Bonus points awarded with this offer are subject to a maximum of 3,000 additional points.