Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
access to the service through third parties may be available or discontinued at the discretion of linden lab . 

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