Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
to access and use certain features of the services , you may be required to register for an account . 

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