Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you further acknowledge that , by acceptance of your submission , crowdtangle does not waive any rights to use similar or related ideas previously known to crowdtangle , or developed by its employees , or obtained from sources other than you . 

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