Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
unsolicited promotions , mass mailings or `` spamming '' , transmission of `` junk mail '' , `` chain letters '' , political campaigning , advertising , contests , raffles , or solicitations ; 

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