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