Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
the nintendo account is personal to you and you may not sell , trade , assign or otherwise transfer your nintendo account to any other person or entity . 

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. OPTIONS: ["Content removal", "Unilateral change", "None", "Jurisdiction", "Arbitration", "Choice of law", "Unilateral termination", "Limitation of liability", "Contract by using"].