Yes but the retailers and Diamond distributors will over revenue and their costs aren't going down and if they lose money DC loses. Plus you now have to color comics twice because digital coloring techniques don't work on newsprint and you have to hire color separators again, if there is a pool of qualified candidates in the skill set that will increase costs so no, they will not remain profitable, in fact, publishing is probably not running at a profit at all, at least not on the floppies sales and even if so, you are decreasing revenue, it's fine that you are still making 20% profit but in dollars and cents you are losing money to use, and that wont happen. It's not jsut about DC, it's about all their partners in the process of bringing comics to market that you have to take into consideration.
The reason the direct market came into existence was that the retail partners and distributors weren't making enough on comics to make it worth their while to carry them or to make sure they got distrubuted properly and put out for sale. If your partners in selling and distributing comics aren't happy or are losing money because of your decision, your books might not get to market. I mean Diamond could say, cool you want to do that, we want an extra 10% of the cover price to make up for our loss of revenue, which is very likely to happen. How does DC reamin profitable when their partners want a bigger piece of the revenue pie because you are shrinking the pie?
-M