Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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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: ['Arbitration' 'Unilateral change' 'Unilateral termination'
 'Content removal' 'Jurisdiction' 'Limitation of liability'
 'Contract by using' 'None' 'Choice of law'].