Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
other than as expressly authorized in the service , you shall not sell , purchase , redeem or otherwise transfer virtual items or merchandise to any person or entity or attempt any of the aforesaid , including but not limited to supercell , another user or any third party . 

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