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