Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
please note that gifting codes can not be redeemed if the recipient has already purchased a subscription through the apple itunes store or our iphone application , or the google play store or our android application . 

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