Does anyone know how this even happens inside the walls of google? Is it an automated process? How is such a (presumably) high revenue account just magically blocked without human intervention? I'm quite perplexed.
There would have been efforts to contact them, but it would have been via their contact method, aka the email they set it up with. Common ways this happens? They are using a credit card to run their business with no backup payment method. Then the company's contact person is on vacation. Sign up for terms. It will get you payment terms!
Railway hosts applications for customers. An uneducated guess for some possible reasons: 1) one of those customers hosted something they shouldn't have 2) railway had something spawn that took up too many resources 3) Or their account balance was too high 4) Or something...
But all of this probably culminates in someone needed to read an email that was missed.
Scaling a customer infrastructure setup like Railway is hard. This is one of the non-technical hard parts - how to make sure your account with your primary vendor is safe. But, I'm willing to wait to pass judgement here until more information is available. I'm sure the post-mortem will have lessons. I'd like to know more.