Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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in such event you will not be entitled to a pro-rata refund or credit . 

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