I don't think we are doing it alone for ego reasons.
We are doing it because we have no choice. Here comes the top question again: Is print dead? For print only magazines, as good as!
No magazine will be sold if there is not at least a little bit of digital magic behind. There has to be a website or a digital version. Something digital.
Until DPS has been released there was only PDF, and ah, PDF and PDF. The problem with PDF was, it couldn't be sold. Free distribution was ok, but retail? No chance! Nearly the same moment where DPS came up, also other types like FlipBooks, MicroSites, came with it. With all these new digital publishing types, we finally felt save. Ah, our magazines are rescued. Unfortunately, now after 3 years we notice that they haven't been saved. We have won time due to these new publication types. Not more.
But the right choice is not yet found. Not even defined. We have to continue and make further long time tests with DPS or other solutions. One day, there will be a next Steve Jobs or Mark Zuckerberg having a great idea which would also revolutionize the digital publishing industry.
As said, It was a surprise that it didn't work even if not everything's about DPS has failed or is bad. But even successful publishers need to agree that it isn't the end of the story.
(It has been months since I bought a digital magazine as App. I've set Feedly for my news. iBooks contains my e-books. Goodreader manages my PDFs with my comments. And thats all I need. To be honest: I don't like myself searching in the Newsstand or all those DPS-Apps. I'm much faster with the browser. And I deactivated all Apps with notifications.).