Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
16.1 the digital product should be used in line with the app store terms of service . 

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