It seems almost normal again now to not have a huge hit straight out the gate but exploding later on, as that has happened to most of the current pop queens of today, but there was about three decades in between there where if you didn't get a smash with your first couple of singles, you were dropped. But in the 80s there was still some sense of patience or realistic expectation. I mean Prince's first three albums delivered very little.
I doubt they would have kept putting out flop Madonna singles forever though - crazy to think that she might have been only a couple more tepid releases away from them dropping investment in LAV, and then maybe she would never have starred in Desperately, and then we wouldn't have had True Blue. How different the music world would be.