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