Dunno about everyone else but I honestly feel Spider-Verse's soft opening is due more to massive competition rather than its animation style or its marketing. Ralph and Grich are still in the top five/top ten at the box office in regards to animated works, Aquaman is arriving as a deueling superhero film, and there's still Bumblebee and Mary Poppins as general holiday tentpoles. Pretty confident Spider-Verse could had opened more if, say, it was released in February instead. At least there, the big tent pole releases for that month are just Alita, HTTYD 3, and Lego Movie 2.
Woof at that ME bomb. Even given its lukewarm reviews, Universal did it no favors giving it that time slot in such a crowded month. If they were sending it out to bomb, they could had at least waited until January. :V