Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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engage in any act that supercell deems to be in conflict with the spirit or intent of the service or make improper use of supercell 's support services . 

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