Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
we do not waive any rights to use similar or related ideas or feedback previously known to us , developed by fitbit , or obtained from sources other than you . 

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