Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
15.2 you may terminate this agreement at any time via the `` cancel account '' feature on the airbnb platform or by sending us an email . 

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