Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
the fitbit service may display or permit linking or other access to or use of third-party content , promotions , websites , apps , services and resources ( collectively `` third-party services '' ) that are not under fitbit 's control . 

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