Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
payments made with a united states-based payment instrument will be charged by linden research , inc. . 

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