Another data point for the massive amount of evidence Glenn Reynolds at Instapundit collects regarding women practicing hypergamy.
Men go for looks, women for resources/accomplishments.
Makes a lot of sense in that hypogamy puts women in the uncomfortable situation whereby the greater their success, the more diminishing it somehow is or feels to a husband of lesser success.
Let alone, of course, women’s relative need for a provider spouse if she’s going to raise children.
The high interest in prenups from female millionaires is interesting, and IMO could be explained by small sample size and/or their planning to mate with rich men, who presumably would have a mutual interest in such an arrangement.