wordminstral - aside from a hearty welcome I offer, as it is always refreshing to breathe another point of view... I think that these words "stink":

...dumbed it down to fit the culture...

I have a word for a person with this "attitude", I call them "classholes".

Just to make things clear: I, by no means am implying that you personally hold those views, as your use is prolly an accurate description of the "savvy marketer" you were describing (although *savvy seems a bit presumptious).

To answer your question... What do you call the use of dumbed-down dialect to pump a product? Marketing!