Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
your purchase of a virtual item or in-game currency within the services is a payment for a limited , non-assignable licence to access and use such content or functionality in the services . 

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