I find that rather strange. All the Ehapa DC Comics I could find had a price in Schillings, Lira, etc, if only to be sold at tourists spots. And those comics sold reasonably well in Germany well into the 80s, though not as good as Franco-Belgian comics and Disney. I’m not so sure about from 1990 to 2010, but that’s because I read the originals by then and then started to lose interest. But I’ve seen quite a few at the German newsstands.
I bet there were plenty of people - Austrians included - who simply conveniently “forgot” that they ever read that stuff.