That's precisely the point, though!

Whether they release it digitally or in print, it's going to wind up online anyway. Already the publishers are saying, "We are losing a lot of money to piracy." If they released digital copies for retail (e.g. by direct download or by selling CDs in stores), you're acting as though that would make the piracy situation even worse, but it wouldn't. All it would do is save
one guy from having to debind his magazine. To all the pirates who downloaded it illegally,
they would never know the difference.
Think about it this way: somebody scanned Comic AUN 2008 03 (even without there being a digital retail copy), and now 100,000+ people downloaded it. Of those, 95% would not have bought it anyway, but 5% would have. So you could say that AUN's publisher lost out on $25,000. Of the 95% who would not have purchased the paper magazine, let's say 10% would have bought it
had there been a digital alternative; but because there wasn't they said "screw this."
It's those 9.5% of the population who the publishers would be targeting with digital releases. We're talking big bucks here -- almost $50,000 of untapped sales! I'm not making any other claim than that. Pirates will be pirates, and yes, if you release a CD then it's going to be fairly easy to crack and the magazine will be up on Share in under 24 hours; but it was going to wind up there
anyway, so why
not print the CD or offer the DDL-for-$ for the few customers who want it?
I guess the best way I have of explaining it is, it doesn't matter whether it's doujinshi, magazines, anime, or PC games --
all hentai winds up on the 'net in a digitized format fairly quickly, and releasing -- or
not releasing -- hentai in a digital format from the start won't have any added negative effect.
One last thing ... publishers are all about saving money, right? Imagine how expensive it is to print 50,000 issues of a magazine. You've got 200+ pages per volume and over half of them are very ink intensive. 5% of the pages and advertisements are in color. Then there's the cost of shipping the paper magazines out from the factory to various stores throughout the country. Ink is expensive. Paper is expensive to ship (HEAVY). Both of these costs could be cut
completely by selling a digital version. If the profit margin for a $5 paper magazine is
x, you could sell the digital version at a lower retail price (say $4) and still make
x or more in profits because of the cut costs.
I dunno. I don't think it's an idea worthy of ridicule.