Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
5.6 airbnb may offer hosts the option of having professional photographers take photographs of their host services , which are made available by the photographer to hosts to include in their listings with or without a watermark or tag bearing the words `` airbnb.com verified photo '' or similar wording ( `` verified images '' ) . 

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