Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
linden lab may modify , revalue , or make the virtual goods and services more or less common , valuable , effective , or functional . 

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