【2019.12 更新】Plastiq 已重新支持使用 Capital One 商业信用卡支付，个人信用卡暂时还没有被 Capital One 解禁。H/T: Doc

【补充更新】Doc 收到 Plastiq 邮件说明 Capital One 信用卡的支付被银行单方面暂停了，不知道是不是群发，我两个账户都没有收到邮件。

As you know, Capital One has asked us to temporarily suspend processing of payments with their cards. We’re working closely with them to remedy the situation and will reach out as soon as we have an update for you. Meanwhile, consider trying some of these great credit cards that many of our customers use to pay their personal and business bills (list of Plastiq affiliate links of other card issuers)

根据读者 batman 的提示，近期 Plastiq 似乎暂时无法使用 Capital One 信用卡进行支付，读者 batman 是进行房租支付。Flyertalk 上也有类似 DP，应该持续了一段时间了，目前尚不清楚什么时候恢复正常。