Broad Base (I'll probably rename it to "Brand Marketing" someday) improves the sales of all your vehicles, but not as much as specificity targeted marketing. It also improves company image more so than specific marketing. 
"great writers are indecent people, they live unfairly, saving the best part for paper.
good human beings save the world, so that bastards like me can keep creating art, become immortal.
if you read this after I am dead it means I made it." ― Charles Bukowski
good human beings save the world, so that bastards like me can keep creating art, become immortal.
if you read this after I am dead it means I made it." ― Charles Bukowski