Shurdus
Am I Napoleon?
Probably enough for it to be an ethical concern.
Now, whether a publisher would actually decide to reach out to these people (probably 2-4 million) or not would depend on if they wish to stay on the relatively "safe" side of Modern Online DRM or if they feel confident that their game will still be successful with a "CD-Key only" version.
It is an ethical concern how? We must not forget that out of all the people in the US, not everybody is a gamer. It is very safe to say that the people who want to have internet for gaming will try to get it if they can. Of the people who want it but cannot get it only a few would want this game. It is not unreasonable to assume this is a minority group. So if Firaxis targets a certain market, it can safely target the people who are gamers with internet access because that is the fast majority. There is nothing unethical there. This is how buisness works, correct?
EDIT: also are there even numbers out that show how many amongst the people without internet are gamers? We can assume there are a few around in that group, but this may very well not be the case. We know nothing of this.