Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
we may at any time and from time to time , in our sole discretion , change the fees and charges , or add new fees and charges , in relation to any of the products . 

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