Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
gift subscriptions are paid for as a one-off upfront payment . 

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