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