Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( b ) headspace offers monthly , annual , two year and forever subscription options . 

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