The main reason is that I'd have to program another integration post-haste, and I don't want sloppy code out in the world because I was rushed. I have an existing relationship with Worldpay Integrated Payments by FIS, and so I'm getting in touch with their developer relations team again so I can start an integration for card-not-present. But that'll probably take a couple of weeks to test and get approved. My Stripe code has been battled-tested.

Anyhow, Stripe's decision on this account has left me scrambling, because the client's web store was built and ready-to-go, just waiting for the client's API keys, and now it's dead in the water.