Back in those days all major manufacturers had a wide gamma of film products. I doubt whether back then all products of the western manufacturers were profitable either. Their idea was to be able to serve all wishes by one source.
I'm sure that you're correct. I still have a stock of Orwo B&W in my freezer and use a roll from time-to-time. I even have a few of their 35mm B&W reversal films, just waiting for the right subject.