[Nowaker]

Our intention is that you share code back to the project if you modified it and added some new great features. :) If I'm not wrong, it only applies to the modified source code, and not the data/machines that you work with. http://stackoverflow.com/a/18406382/504845

[angersock]

So, as your link mentions...why not just use GPL?

It's good enough for Linux.

[conradk]

AGPL means that if you modify VirtKick itself, you have to contribute these modifications back to the project. GPL does not enforce this for software run on a back end.

[dec0dedab0de]

likely because it could be a hosted application. If he were to choose the GPL then someone could make modifications and host them as a competitive advantage without sharing the modifications to their users.