I just copy paste the email that I received. I think the Intel XDK support is the old Intel AGI not the new Android Crosswalk.
LeadBolt's Updated Framework Support
This New Year we are starting with some big LeadBolt news! In response to the great feedback received from developers, we have updated our range of compatibility libraries including additional support for some new frameworks. This allows you, the app developer, more options than ever before to access the advanced features (including re-engagement functionality and improved ad serving speed) in our latest ad serving SDKs.
See the full list of our latest framework support below:
Android
Intel XDK NEW
Xamarin NEW
Construct2 NEW
Cocos2d-X
PhoneGap
Basic4Android
Unity3D
Titanium Appcelerator
Marmalade
Corona
iOS
Intel XDK NEW
Xamarin NEW
Construct2 NEW
Cocos2d-X NEW
Cocos2d NEW
PhoneGap
Marmalade
Unity3D
To get started, login to the LeadBolt portal to download our SDK and framework compatibility libraries today!