I'm not sure to be honest, never gifted from Desura - however +1 for your thoughts of doing so :)
Well, most people whom I've seen give away Desura stuff use codes.
I looked again, and I'm not 100% sure, but it looks like they have to be sent by email or by Desura. I think the codes only come from bundles.
EDIT: I was kinda hoping to just leave some codes here. :P