I was never able to find out why the account was shut down, I'm guessing it was a ToS violation for something I did several months before I got banned (made 100+ gmail accounts with my invites, didn't use them for nefarious purposes though.) Just one day I couldn't log in and got an ambiguous page about account deactivation. No amount of emails or form filling ever earned a response from Google. That was it. Blam. Gone. Ever since then, I have not trusted Google with any data that I care about.
It would be nice if this tool worked for deactivated accounts.