Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
selling , trading , assigning or otherwise transferring a nintendo account to another person or entity ; 

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