Railway does not support using prepaid cards

But I was able to buy $10 in credits in February, can't I do it anymore?

If you let your account fall back to the free trial plan without loading credits, you will not be able to load credits any longer.

The Railway team has removed the option to sign up new accounts with prepaid credits, as it is a hassle to support. Existing users who keep their account in good standing can continue loading credits, so long as they don't let their account fall back to the trial plan

!s