Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( g ) you agree to promptly notify headspace of any changes to the payment method you provided while any subscriptions remain outstanding . 

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