Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you acknowledge that supercell is not required to provide a refund for any reason , and that you will not receive money or other compensation for unused virtual items when an account is closed , whether such closure was voluntary or involuntary . 

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