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 . 

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