Was Ashley Madison even in the business of promoting adultery? At Fusion, Kash Hill quotes Rob Graham of Errata Security saying "It’s about 28 million men to 5 million women in the account list,but essentially all men for credit card transactions"That's a massive skew compared to other dating sites. Now, maybe Ashley Madison was running a sort of perpetual Ladies' Night so that the women never had to pay. But even so, the disparity between the number of men and women suggests that Ashley Madison's core product was not actually extramarital liaisons, but fantasies -- subscribing to the site let you hope that you might get to have an affair. Which is yet another reason that the business model was done the day their data was hacked. What a buzzkill. Straight guys aren't going to fantasize about joining a site full of dudes.
What does the disparity in the genders say about men and women? The old saw that women want relationships while men want casual sex is frequently disputed by feminists, who point out that women have long been penalized for seeming to want casual sex. But here's a site that specializes in attachment-free sex that, theoretically, no one will know about. And it appears that, to a first approximation, its only actual customers were men.
Economists like to differentiate between "signaling" -- presenting an image that you think will get you what you want -- and "revealed preference," when you act to get what you actually want. Married women seem to be revealing a strong preference for not having affairs with men they meet over the Internet.
Now, that's not to say that women don't want to have affairs, or even that they don't have affairs. Women may simply find it easier to find a low-risk partner. But that itself tells us something, which is either that many more men than women want to cheat (or at least see what their options are for doing so), or that more men than women are willing to have no-strings affairs with married people. This may be innate, or it may be culturally conditioned, but either way, it seems to be pretty powerful. It's definitely not evidence for feminists who wanted to show equality in casual sex drive.
.