Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
4.4 linden lab has no obligation to accept returns or provide refunds of any amounts paid for products or services purchased from linden lab . 

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