Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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this includes win trading and any other kind of manipulation of rankings , taking advantage of errors in the service to gain an unfair edge over other players and any other act that intentionally abuses or goes against the design of the service . 

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