SuperGrok Heavy users hit account blocks

This looks less like a one-off device glitch and more like brittle account enforcement around xAI's premium tier. For a paid AI product, access stability and appeal paths are part of the product, not support trivia.

• –xAI introduced SuperGrok Heavy in July 2025 as the top-end Grok tier with access to Grok 4 Heavy, so a block on that plan hits the most committed users hardest.
• –xAI's docs cover sign-in linking and subscription management, but they don't spell out a clear public process for sudden account blocks or automated fraud/moderation flags.
• –Community posts across r/grok have repeatedly described logouts, failed activations, throttling, and “user is blocked” messages, which suggests a broader reliability and trust problem.
• –If this is intentional enforcement, xAI needs a clearer explanation and faster appeals. If it's a bug, the communication gap makes the issue look worse than the technical failure alone.