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