There are other ways to hack dating sites that use other means completely.

Have several friends on the site, all with their real profiles. When you like a girl, have a friend with the most compatibility message her, and introduce you two. If such a "cool" guy vouches for you, how great must you be? She is intrigued. She hasnt gotten messages like this. And you go out w her. Not only that but you start w a warm introduction and something to talk about.

And if she doesn't respond to him, you can message her yourself, and bam - double your chances.