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