Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
`` gift subscriptions '' are pre-paid memberships to the products . 

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