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 . 

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