Well, the Donald Duck comic is mainly targeted at kids, and last I checked the kids were reading them all the time... but there are several collections, books and specials that are aimed at an older audience. It's the same stories, just higher quality printing/coloring/paper.
Sooo... both, I'd say.
Norway even has its own (half-parodic) pseudo-intellectual groups called Donaldists, who analyze, review and discuss Disney comics (and most prominently Duck comics, given that Donald is Disney's flagship character in Scandinavia), even with their own infrequently-publish "academic journal" magazine called Donaldisten.
On a totally unrelated side note, I actually had an article published in one issue of Donaldisten, about the writer/artist William Van Horn, although it took several years from when I wrote it to when it saw print. I'd actually forgotten I'd written the thing when I suddenly saw my own name in print, and I spent the rest of the day switching between being thrilled about the article and horribly embarrassed because the younger me had an extremely clumsy and awkward writing style that made me go "Did I really write this drivel?!"