Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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headspace memberships and subscriptions are not transferable and therefore can not be sold or exchanged or transferred in any way whatsoever . 

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