I think it is the relentlessness of the message rather than the quality of the pitch that got them up there.
I'd like to suggest that it is the quality of the pitch, specifically, the double entendre, which got most of them up there.
When we literally 'think twice' about a slogan we hear for the first time, we are more likely to remember it than if it made no first impression at all.
As you have said, some undistinguished slogans ("pretty dire corporate power chord fests") can be drilled into us if we are exposed to them often enough, but, dollar for dollar, wit delivers more punch than ubiquity any day of the week.
Of course, ubiquity works. We will remember a slogan even if we have grown to hate it.
When presented with an impulse decision, we will buy what we 'know' even if it ought to be against our better judgment. If it weren't so, advertisers wouldn't try to 'subvert' us.
