It's because we realize that theaters don't say "oh, that money is for marketing? We'll give you 100% of what we made if it's going for that."
Theaters take ~50% of the box office, and it's from the rest that everything (including marketing and production) gets paid back from.
If Wanda is included in the box for which you are computing profit/loss, all the extra expenses of actually running those theaters have to be added in too (in the normal case when the theaters are a separate entity one doesn't care if the theaters make a profit; one assumes they are big boys who can figure out when negotiating the contracts how much to skim off to keep operating.)
- - - Updated - - -
They probably wrote it off a while ago.
I found this editorial review in MassivelyOP to be daming.
http://massivelyop.com/2016/06/13/ed...olutely-awful/
So yes, I am a fan. And this movie is garbage. It’s stupid. It’s drivel. It’s a film without any sort of clear protagonist. After an hour, I found myself staring at the screen and thinking that I don’t care about any of the people on the screen. I don’t even know them, and I don’t want to. It made the backstory of a universe that I know quite thoroughly seem boring, trite, and even more generic than it already was. It gives me no reasons to care. It fails as a visual spectacle, it fails as a prequel, it fails as a narrative, and it fails in every possible way that a movie can fail.