MechaPilot
Explorer
I wager its because they don't work with digital offerings like D&D Beyond or the virtual tabletops. It also solves problems with later editing.
My bet would be because it takes less work, thus requiring less labor hours, thus requiring less wages to be paid, thus increasing the gross profit percentage for each unit sold. Which, in turn, lowers the break-even point and reduces overall risk.
Or, ya know, because they just didn't want to. Which would be fine if the indices weren't so bad.