It's worth pointing out that Kingsglaive's budget was actually treated as part of FFXV's marketing budget, so it was probably never expected to make back its full budget in ticket and video sales.
Not to mention, it's very difficult to say what data a site like that would actually have access to. Given the site's description of its method of determining sales, it's almost certain that the vast majority of sales slipped through the cracks. Observe:
Blu-Ray sales of Kingsglaive
Date.................
Units.........
Total
10/09/2016.....57,706.....57,706
10/16/2016.....10,916......68,623
10/23/2016......6,369.......74,992
Every single copy of the Ultimate Collector's Edition contained a Blu-Ray copy of Kingsglaive. 40,000 UCEs were manufactured, and the UCE sold out when it released on November 29th, which would increase the total sales by over 50% in and of itself.
However, Kingsglaive was included with the Deluxe Edition, as well. Assuming that at least as many people purchased the Deluxe Edition as purchased the UCE, that would double that site's sales estimate... and it seems rather unlikely that the $80 version of the game wouldn't sell
significantly more than the supply-limited $270 version.
And, of course, there's the specter of digital sales and rentals to consider, which I suspect would be a major factor with something like Kingsglaive. The DVD sales were pathetic, but who in their right mind would buy a DVD when they could watch the movie in HD for $5? Not to mention, I expect that a not-insignificant fraction of the people who got the movie in a package with the game rented the movie, since it was possible to rent months before the game came out.
So, how did Kingsglaive really do? I think the best answer to that question is, "Who knows?"
