笔者从未看过 Prime 附带的视频福利，收到此 offer，似乎点击一下即可触发。猜测是 Targeted 的，credit 可用于 sold by amazon 的产品。
- offer 链接（如果你有收到，建议从你的邮件里面点击前往）
- 主要的 Terms：
This offer is only valid for eligible customers located and with a billing address in the United States who stream any movie or TV episode included with Prime Video (excluding trailers) by 11:59 p.m. (PT) February 29, 2020.
You need to be a prime member and signed into your amazon account to participate in this promotion.
You need to enter this promotion by clicking on the “Activate Offer and Watch Now” button in the email.
The maximum benefit you may receive from this offer is $5.
After making your first stream, you will receive an e-mail from Amazon within 3-5 days that indicates the $5 promotional credit has been added to your customer account.
Promotional credit must be redeemed within 14 days of receiving the email with the $5 promotional credit. The promotional credit may only be used once and may not be combined with other offers.
Promotional credit may only be applied to products and digital content sold by Amazon.com or Amazon