Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
any notices or other communications provided by fitbit under these terms , including those regarding modifications to these terms , will be given : ( i ) via email or ( ii ) by posting to the fitbit service . 

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