What it comes down to, is that men and women view online dating entirely differently.
For a lot of men they view the components of the dating site like a game.
With a beginning point and character creation. the fight or the race (getting picked) this often means they are expecting a prize for winning.
This isn't always a conscious thing it's just the difference in how men and women view internet interactions.

I was discussing this with my S.O last night. As we are both gamers we both have alter egos we use online. And that was something we had to move passed when we met in RL.

I have also noticed, women highlight the negatives in an online profile.
Men ignore them and focus on the compatibilitys, which is why they are often confused or defensive when their faux pas' are pointed out.

I might ask them to do a quick question and answer when you talk based on the details in your profile focusing on what you are and aren't looking for, if they can't answer what you don't want and it's clearly stated in your profile you know they didn't take it in and that their focus isn't on a long term relationship. But winning the game.