Yes, it was published. I noticed that you have changed "it may be" into "it can be", I think this will not make the sentence better, and might not be the original meaning of the author. Because I doubt that "can be A or B" implies an exhaution of possibilities, while "may be A be B" does not. The author perhaps thinks that it may be A (useful, calling up some kind of patriotism or Volksgeist, to promote this enterprise.), may be B(dangerous), may be C(neutral, cold description). In this sense, a concept can become a speech act.Is that sentence from a published work? "Hollow promises?" I think you'd need to look at the context.
"Typically" could be used here to mean that "the notion of ethnic enterprise" is one example of some larger number of concepts like it that can "be useful or dangerous, depending on the context in which [they're] used."