Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
when members make or accept a booking , they are entering into a contract directly with each other . 

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