Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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our logos and any other fitbit trademarks that may appear on the fitbit service , and the overall look and feel of the fitbit service , including page headers , graphics , icons , and scripts , may not be copied , imitated or used , in whole or in part , without our prior written permission . 

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