Just happened by the other day and saw the announcement. This game is still my favorite and I still have LAN (yes, I said LAN for those who say no one does that anymore) parties with my friends and brothers. I have bought numerous copies for friends and relatives for gifts and thus have to say I have spent more money on this game than any other. This was one of the most perfect games I have ever played out of the box. Even the Beta ran smoother than some of the finished games I have played. Add to that the lack of invasive DRM and the fact that it worked out of the box without having to register/unlock the game and you have one of the most enjoyable gaming experiences in recent memory.
Now, I have one question. Is there going to be a retail/box version? I've seen a lot of speculation, but nothing from the developers. Digital copies are all well and good, but not everyone (4 of my friends and a few relatives come to mind) have a reliable Internet connection, if one at all (3 or more at least of the previously mentioned people and possibly me soon if my hours get cut at work anymore than they already have). This is one reason why we still have LAN parties. Some of us live in very rual areas or can't afford Internet access. As far as it not selling, when Trinity came out, my local Wal-Mart had a several facings of it on the shelves, and they sold out of it before I got paid and could get my copy. I had to wait until the following week to get my copy. Best Buy seemed to sell it very well also. Gamestop, admittedly, not so much.
The point being, there is still a market for retail copies. Even if everyone had reliable high-speed Internet in their area, they may not be able to afford it. Now, having said that, lets go into how it could be done a little cheaper:
1. Simplify the packaging. If you have your game in a DVD case (which is pretty sturdy and is protected from scratches by the shrinkwrap), why do you need the cardboard box around it (original Sins and Trinity)? This is unecessary and could be eliminated, saving on printing and manufacturing costs.
2. Eliminate the paper manual. Before anyone complains, let me point out that the manuals for Sins have always been included on the disks in .pdf format. To tell the truth, I have never even taken them out of the box other than to see my serial number when reinstalling. I always look at them on the computer and only print out the pages I need. This could, once more, save on printing and manufacturing costs, not to mention saving paper.
3. Charge more for the retail/box version. You did it with the original Sins, so do it again. Rebellion costs $39.95 for the digital copy? Then charge me $5-10 more for the physical copy. This will help to generate a return on your investment. Some recent PC games already cost $60, so anything $50 and below still seems like a good deal to me.
4. Supply the larger retailers, including those who sell products other than games. As I mentioned above, Wal-Mart and Best Buy seemed to sell lots of copies locally (Wal-Mart, despite recieving many copies always seemed to sell out a few days after delivery), whereas Gamestop did not. Some of this was probably due to the fact that the larger stores see more business during the day, hence more people see the game (plus, none of the Gamestops locally have much in the way of shelf space for PC games and WM and BB still have isles devoted to them). Since they sell other products as well, many people go in for something else, see the game, and maybe impulse buy a copy (pun not intended).
5. Make the retail copies available in your online store. A no-brainer. This will also help you unload any retail/box copies that didn't make it to stores (when sales begin to slow down).
Also, as a last resort, what if you made it possible to download the original version of the game from Impulse directly onto my own disk? This could allow gamers to download the original game before the updates. This would have several advantages, such as allowing gamers to revert to the original version of the game (for Mods, for example), allowing gamers to always have access to a physical copy, possibly allowing gamers to access Impulse on another computer to download their copy if they were without Internet access (my friend accessing his own copy on my computer, for example), and helping to prevent piracy of fully upgraded copies of the game (since the copy in question would be the original version).
These were just a few suggestions. I felt that instead of just commenting/complaining, I should at least propose suggestions to the problem. I really would like to hear from the developers on this.