Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
use the airbnb platform in connection with the distribution of unsolicited commercial messages ( `` spam '' ) ; 

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