My wife, our new interest, and I all had OKC accounts before we all met. We have since deleted them. For women, they tend to get messages from guys who just want a quick hook up, and for men, we tend to only get women who are....not attractive. This has only been MY experience with OKC.
Generally speaking (and I really hate to do that) men see the word "polyamorous" in a womans profile, and they read it as: "desperate", or "easy", or "slutty", or "fucks on the first date".
Women who see "polyamorous" in the profile, read it as: "weird", freak", "cheater", "only out for sex".
My wife and I have been wanting to help develop a poly dating site, but are not computer savy enough to do it alone. And the only person we personally know of who COULD do it, is ellusive, at best.
There is a lid for every pot...Sometimes even two or three...