Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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we have the right to investigate violations of these terms and any conduct that affects the fitbit service , and in response may take any action we may deem appropriate . 

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