We do prioritize tickets that indicate an issue as complete blocker. Our team that monitors hackernews for feedback, issues, and criticisms work to make sure these things are actually being prioritized, as it’s not always clear from the support ticket how severe a blocker might be.

Is "my account is suspended, I don't know why" considered a "complete blocker"?

Yes, if the support ticket is opened when the issue is discovered. This particular instance was first reported on hackernews and was due to our dormant namespace policy: https://news.ycombinator.com/item?id=23827772