Same as you. It costs $11 to read that thing and I assure you, nobody has read it (except maybe now that I said it out of spite). It looky like every other pop-psy study out there, many of which have been discredited over the years - at least the ones that people actually bothered with. It's unscientific trash designed to support broad generalizations and preconceptions. The entire field is known for making stuff up in a manner that is consistent with the cultural background and expectations of the study's authors.
The crux of the matter is that these studies are supposed to show how certain behaviors are biologically hardwired into humans, when in fact the vast spectrum of human behavior and perception is frighteningly flexible and subject to the change of cultural and personal values over time. Many people, including pop-psy researchers, have a vested interest in showing that our behavior is preprogrammed by nature. In fact, the prescription of what's natural has been used as a justification for laws and rules for many hundred years now, so it's kind of a tradition.
Any study of human behavior, especially if gender roles are concerned, needs to cite specifically the cultural context and timeframe the observations were made in. Advertising people know this. That's why they use different strategies in different countries, and it's also the main reason why advertising premises change over time.