I did an online matching site once, and I think I found a very useful way of finding quality women. Now, for a caveat: This was more of a sex site (technically BDSM), so people were far more upfront about hooking up for just sex. While dating sites are different, I doubt I'd change anything if I were to put up a profile in OKCupid or some such. Also, I paid the premium fee to get my profile at the top of the search lists. I don't know about other sites, but this one allowed for a lot of free profiles, and it was easy to get yours lost in a sea of free "do me plz" profiles. I shelled out a couple months' worth of fees to make my profile show up at the top of the lists.
What I did was use language to hook interesting people. I don't remember what exactly my profile said, but I did use words like concupiscence, persiflage, and cupidity. That may not work for everyone, but for someone who engages in the occasional bout of magniloquence, it was perfect for me. Now, being at the top of the search lists for a while, I'm sure my profile was seen by several women. I only got to hook up with four of them. My profile picture was not sexy, but my writing was. All four of them said that they were intrigued by my vocabulary.
I haven't done any formal research into this, but I would wager that Dominion players are smarter than the average schmoe. Showcase that intelligence. If someone wrinkles her nose because you said you want to break the ennui, then you're probably better off without her. I only had those four bites (kind of literally actually), but I consider my foray into online hookups wildly successful.