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