The story thats not being told is how those "hundreds of hours" spent building "snow fall" included direction, videography, 3d and 2d modelling and animation, photography, content-writing, design, coordination, and frontend development.
Scrollkit took just one aspect of that (frontend development) and stated "The NYT spent hundreds of hours hand-coding ‘Snow Fall.’ We made a replica in an hour."
Its outright dishonest, and devalues the great effort that others spent on it. I can understand why they are pissed.