Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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4.4 linden lab has no obligation to accept returns or provide refunds of any amounts paid for products or services purchased from linden lab . 

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