Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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your decision to provide this information is purely voluntary and optional ; however , if you elect not to provide it , then you may not be able to access certain content or participate in certain features of the service . 

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