Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
renewals : subject to the terms hereof , you may choose to renew your subscription at the end of the subscription period . 

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