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