Audience don't really care about verdicts. You show them an industry hit and if they don't like it then it's flop. Same goes for a flop film. The verdict based on mass reception at the box office & general audience perspective isn't same.
Yes, a film that runs well, obviously the general audience who even haven't watched the movie, the perception would be "hey that movie must be good" or "have you heard, that film is very good".
The whole marketing angle is depended on this notion.
In South, these posters or tv promos are released for that purpose only. Previously Bollywood posters or promos followed it too. Jaan-E-Mann had Super Hit posters printed which Nadiadwala took it back after the film didn't do that well & contrary to that Don used the Super Hit posters all over. Super Hit poster for Lucky - No Time For Love was released. It is common in business.