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