Minimal extra cost = cost.
Most studios don't give a shit. Not having that extra version will probably lose them 20-30 sales at most. I'm sure they'll live without $300 worth of sales vs. thousands of additional dollars to add that content in. Be thankfully you even got any Special Features.
I get what you're saying, but by that argument, why include any special features at all? All of them are extra cost, and some of them probably more than this -- I'm sure it takes a lot more effort (and expense) to sync up a commentary track to the new video encode of the movie than it does to simply throw existing, already encoded SD content onto the disc with everything else. I'm also sure that most people who want to buy the movie would buy a bare-bones disc if that was all that was available.
Personally, I don't give a shit about most special features -- most of them are fluff anyway. I don't usually bother with commentaries, featurettes, or whatever unless I really
care about the particular movie. The ones that I do care about are the ones that are additional actual content. So it just seems odd to me that if they're going to leave off a special feature, they'd choose to leave off the one that I would actually find meaningful.
Can i pick up Casino Royale Craig version at Best Buy?
Yeah, you can. I've been to a few stores in my area since it went on sale, and they've all had it in stock.