Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
additional terms and conditions ( to be shown prior to purchase ) apply to custom accounts . 

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