Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
any violation or attempted violation of this provision may result in the immediate termination of your ability to access the fitbit service . 

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