To avail of the 50% hosting discount you need to click the hosting link through this page http://www.appthemes.com/resources/wordpress-hosting/ and of which when clicked it leads only to hostgator.com. And with that I believe it only works with the hostgator.com however you may contact hostgator support to see if it is applicable.
Please help our moderating team work more efficiently by not sending us support questions via PM. You can read more about how AppThemes support works here. However, you can send a PM to follow up and remind me if I missed your support request/thread.
