In my experience, it is not just the subs but also the so called Doms. There are, I think, just as many 'Doms' who go into chatrooms and try to 'dominate' any woman who is in there with such sterling lines as 'Bow down before me, bitch' which is rarely preceeded by even a cursory 'hello' to the room, never mind the Dominant lady he is talking to who was just having an interesting and rather vanilla chat with their long term online sub...
I think the problem (if it may be seen as such, personally I don't) in this site is that we have intelligent and insightful posts and the successful Dom/mes and subs are those who participate in discussions in intelligent and insightful ways. Some men come here looking for a quick, dirty shag or a bit of online play and, finding nothing but discussions on everything from politics and religion to 'what is a sub', get bored and wander off elsewhere.
At least I hope this is the case otherwise my whole strategy for getting a quick, dirty shag is useless (and I have been pursuing it for several years so far, success may not be far ahead...)
The chatroom from what I have seen is not populated by these missing subs. Most of those I see in the chatroom are those who also post in the forums and there are usually more female subs than males (but then this was originally a very Male Dom/fem sub orientated site, though us 'femdom wierdoes are creeping in now).