AppImage. The "we want the brownie points for supporting Linux but don't want to actually go to the trouble of supporting Linux" of application packaging methods.

Also how do you update appimages other than manually checking when a new version is released downloading the new file? Is it going to need a Windows style update checker that runs on launch and just opens a URL to the downloads page? At least it can't just register itself as a startup item or service behind your back like on Windows.