"I wanted to win and be the biggest movie star, and what happened was there was a lag. Around Wild Wild West time, I found myself promoting something because I wanted to win versus promoting something because I believed in it."
Smith said he "tricked" fans into seeing the film but because of the power of word of mouth over the internet, that was no longer possible.
"Back in the '80s and '90s you had a piece of crap movie you put a trailer with a lot of explosions and it was Wednesday before people knew your movie was shit," he said.
"But now what happens is 10 minutes into the movie, people are tweeting 'This is shit, go see Vin Diesel'."
He also said: "I have to be in tune with (fans') needs and not trick them into going to see Wild Wild West."