To sidestep the doom and gloom for a minute, it does makes you wonder just how relevant the digital side of things is becoming in today's climate. Maybe Halo 5 did perform below expectations, or maybe there are a lot of units not being accounted for by a chart that only focuses on physical copies sold.
At best it's an extra 20% of sales from digital as that's what most market reports say is usually the coverage for AAA games.
Still would leave Halo 5 with a poor debut here at like 180k overall.