The first thing you have to understand is the bias of the medium.
The medium of the web includes a bias towards low-to-zero communication costs.
So, while few men would try a pseudo-random, scatter-shot approach to dating, such as standing on a street corner randomly inviting every woman who passed by if they want to "get busy", the Internet allows just such an approach.
This creates a very low signal-to-noise ratio for women vis-a-vie suitable suitors (see the related thread in the description for many women complaining of this very problem).
With the development of the new wave of online dating and ...