Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
parental control functionalities offered by nintendo may not work with third-party services . 

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