Of course I have no idea how well it was marketed and such, but still, that's crazy low. So bad in fact, that I suspect that has something to do with why it was so hard to find a US version of the Blu-ray. I had to order a region-free German copy on eBay. Anyway, I got the DVD, too, so I could see the special features. There's a cool hour-long 'making of' documentary that's largely in Spanish with subtitles.
Here's a great little YouTuber video on the history (of course don't watch this before you see the movie)...