Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
supercell may revise the pricing for the goods and services offered through the service at any time . 

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