Ultimately it did not disappear in 30 days. Was it because I upload passport photos? Not sure. Because I spoke to customer service? Not sure. Because the original shutdown notice was a mistake? Not sure. The lack of clarity made it worse.
I've heard stories about people losing personal accounts like this due to GCloud usage. At work, where I'm CTO, I have open access +MSAs to the three major cloud providers -- BUT I am very hesitant to use anything but AWS/Azure. The risk of something going wrong with GCloud and that metastasizing to my (or anyone's on the team) personal Google account (or vice versa) is huge and just not worth the risk.