Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
`` payment service provider '' means a third party payment service provider as contracted by linden lab in its sole discretion . 

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