Difference between ASIB and all those other Oscar hopefuls that didn't open well (Widows, Green Book, First man, etc) is that ASIB entered the theaters as a big favorite to WIN which gives a movie an urgency to be seen, as opposed to movies only hoping to get nominated. Granted, ASIB has more cross-appeal too as well as an actual star power (which Gosling, Viola, Viggo, etc are not) but being marked as a potential winner is an advantage over "maybe nominated, maybe not". Also, it was smartly released as counter-programming to Venom, instead of trying to elbow its way among direct competition.