The strategy may be working. The responses I have seen on sites like IMDb seem to be from persons who have either seen the premieres at various cons or who have purchased the digital downloads.It's probably meant to lessen the impact of online piracy. DVD and BD versions are usually sent to stores a couple of weeks early and the smaller ones tend to sell them before the official release date. Even before WB started with these staggered release dates for digital/physical, the films always leaked online a couple of weeks early. The way it works now, people who absolutely can't wait at least have a legal avenue to see them as soon as possible.