I think you may be over estimating the sales numbers of some of these Warner catalog releases. I bet they print just around 3000 of them (or perhaps less) for many of them without advertizing it as limited (in that they can do a new run if they get low on stock).
Agreed Brandon. But with a caveat...except for a handful of surprise over-achievers, most of these *unofficial* limited editions will likely never get re-run either, at least domestically.
Assuming you could ever get a straight answer, just ask any of the major studios what their typical 1st run is these days for a catalogue title on Blu-ray, or even DVD. From what information I've been able to glean (anecdotally, and resolutely 'off the record'), the actual numbers would be shocking to many who assume that there has to be more potential customers interested in that particular <fill-in-the-blank> title, since it was a major, award-winning, global B.O. hit. It's just unimaginable that there aren't 10s of thousands who would gladly jump on that baby day one.
Of course there still is kinda/sorta...just not on Blu-ray or DVD anymore. What's changed drastically since the late '90s through mid-'00s is the '800 pound gorilla which is no longer in the room'...i.e. disc rentals. With the spectacular retrenchment and eventual demise of Blockbuster plus so many other rental outlets in recent years, the studios quickly lost a major source of assured disc revenue. For many vintage catalogue titles the studio's chief justification for larger runs was the near-certainty that the major rental chains could be counted on to immediately take 4 or 5 digits of stock off their hands, with the big boxes accounting for the rest. Simple math: those larger guaranteed-market runs = a lower per unit cost.
However, once those guaranteed outlets for larger disc runs dried up and renting shifted to streaming and downloads (plus PVR recordings off cable), studios have pretty much been left with only the core collectors like us who still care enough about these titles to actually want to buy them (yet again) in HD...which is further constrained by the huge numbers of now dirt cheap DVDs still in circulation satisfying casual movie fans who feel "hey, an upscaled DVD is good enough for my modest-sized monitor."
So despite superior A/V specs, through no fault of its own other than its late-to-the-party timing, Blu-ray has naturally become a niche collector format, at least for deeper catalogue titles already widely available in other cheaper and more convenient or 'good enough' form. Anything with a residual, dedicated fanbase and usable HD master will eventually get done on Blu-ray though...if not by the home studio, then someone. We'll just have to get used to the greatly reduced economies of scale, and be patient as [much] smaller runs become the norm via multiple other sources, including the studios' own archiving programmes (such as the WAC).
Bottom line: with disc rentals gone, and legacy SD disc ownership still so high, there are simply fewer ancillary markets left these days for new HD discs. At least at the scale a multi-national like WB needs to justify a minimally profitable hard media release.