Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you may only purchase services for your personal use or to give as a gift unless otherwise expressly permitted in these terms . 

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