Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
in addition , hosts may instruct a co-host to provide certain one-time services in relation to their listing . 

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