Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you shall use your account only for non-commercial purposes ; you shall not use the service to advertise , or solicit , or transmit any commercial advertisements , including chain letters , junk or spam e-mail or repetitive or misleading messages to anyone . 

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