Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
the provision of virtual items for use in supercell games is a service provided by supercell that commences immediately upon acceptance by supercell of your purchase . 

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