Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
airbnb may restrict the availability of the airbnb platform or certain areas or features thereof , if this is necessary in view of capacity limits , the security or integrity of our servers , or to carry out maintenance measures that ensure the proper or improved functioning of the airbnb platform . 

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