Although men used spending on luxury items as a short-term mating signal, women did not spend to attract men.
What they’re talking about, apparently, is that women don’t [tell researchers that they] buy big flashy luxury items to attract men for hookups and flings. Because makeup, designer clothes, personal trainers and plastic surgery are, y’know, free.
This pretty much encapsulates the traditional post-1980 rules on feminine versus masculine behavior: women have to make it all seem effortless. It also contradicts previous research results.