I know for some people the prospect of losing their Google Cloud access due to an automated terms of service violation on some completely unrelated service is worrisome.
https://cloud.google.com/resource-manager/docs/project-suspe...
I'd hope you can create a Google Cloud account under a completely different email address, but I do as little business with Google as I can get away with, so I have no idea.
That's generally speaking a good practice anyways. My Amazon shopping account has a different email than my Amazon Web Services account. I intuited that they need to be different from the get go.