Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you can control most communications from the fitbit service by using your account settings . 

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