Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you can become a subscriber by purchasing a subscription to the products from the website , within the apps , where allowed by the app marketplace partners , or through a bundle with one or more of our bundle subscription partners . 

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