Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you may only purchase services for your personal use or to give as a gift unless otherwise expressly permitted in these terms . 

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