Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
in addition , if you purchase physical goods from oculus , other terms of sale or promotion may apply from time to time . 

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