As a young girl into BDSM (yep, we do exist!), who is in 3 of the sites mentioned in this thread, I would like to tell my (our?) side of the story. The simple fact is that we're totally outnumbered and overwhelmed. It's a bit like being the only kinda-decent-looking girl in a packed nightclub (I'm not especially gorgeous or anything, just your average scrawny girl next door, people say I'm cute but that's all.) If I don't sign in for a week, when I do, finding 100+ messages, friend and chat requests etc is not unusual at all. Just properly sorting them out can take hours and it feels like a job rather than fun. If you're not in the mood, you just mark all of them as "read" and start searching yourself for whatever you're looking for.
Because, no, we aren't "generic girls", we are in those sites looking for something which fits you. We're persons, like you, with our own tastes, fantasies, cravings or whatever which may or may not fit yours. If we just wanted to meet a "generic partner" or just have a "hardcore f**k"... well, you know how the world turns, we wouldn't need to join any site, just attending the nearest event, munch or whatever will do. In my experience and having talked to other girls, those of us who join a site and are actively seeking (including myself) are looking for stuff that we can't find at the nearest event. We're looking for a specific "match." If you don't feel like that "match", expect a "thanks but no thanks" answer in case I'm not so overwhelmed that I don't answer at all.
I'd ask you to read our profiles and check our groups/fetish/kinks lists etc before making contact. If they don't "feel like you"... please don't lose your time and mine (ours?), it's not gonna work. A friend of mine for example is looking for Dom/Domme couples to be their slave as explicitly stated in her profiles... and over 95% of mail and requests she gets come from single men or Dom/sub couples. The remaining 5% are full of single men or Dom/sub couples posing as Dom/Domme couples... that's going nowhere, sooner or latter she's gonna realize it. I, for instance, am not looking for a Master/Mistress or sub, I just want to experience some fantasies that I've had for a long time. Even those who are looking for a more "conventional" Dom/Domme or sub will most possibly be looking for a specific match ---just like everybody. That match will most possibly involve a real relationship, not just being "the toy" for someone to play with when they're not with their wife and kids. You get what I mean. Etc.