Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
funds can only be used to purchase digital products from noe in nintendo shopping services . 

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