There's no persuasive evidence to indicate that Ashely Madison didn't fake female profiles. There IS evidence they faked profiles. Assuming they were only female seems a bit biased, no?
Note that your objection about fake profiles not chatting doesn't really hold up. Fake female profiles also don't chat. The idea is to keep presenting pictures and profiles that you like, to keep the hope alive.
I'm not sure if I'm being particularly unclear, or if you haven't looked at the original article and so are unfamiliar with the context for my remarks.
One of the flags that the analysis used to estimate relative proportions of "real" to "fake" accounts were a couple of data fields that were maintained in AM's private data but not accessible from the public-facing side of the site. These fields included information on when an account holder last checked his or her messages (if ever), when an account holder last used the AM chat system (if ever), and when an account account holder last replied to a message (if ever).
The number of male accounts which had carried out at least some of these activities at least once was on the same order as the total number of male accounts. (Of 30 million male accounts, about 20 million had checked their messages.) The number of female accounts which had carried out at least some of these activities was only a minuscule fraction of the total number of female accounts. (Of about 5 million female accounts, a few thousand had checked or sent messages.)
Do the data we have support the notion that fake females vastly outnumbered real females? Yep. It it possible that there were faked male profiles as well? Sure. Do the data we have support the notion that fake males make up any but a minority of male accounts? Nope.