As was already pointed out, if you're under the radar then how can you be found to get more work? It's not a matter of how often you advertise - real advertising - it's the constant barrage of posts that make me not look at someone.
When I see a request/iso and the same girls respond repeatedly - especially when they don't fit the stated criteria - that turns me off from that one and I'll pass. When I see blatant bs posts that have nothing to do with anything but it's just an attempt to get your name out there over and over again - I'll pass. When I see girls who are coming to town and find it necessary to post on everything they can find and then go through the welcome section and post 20 welcome messages so we can see her name - once again, I'll pass.
It's like spamming my email. Some of the messages may be ok but hell, when you send it to me over and over again I'll block your ass, well, when I see the same names over and over again especially on shit that does not apply to them then they go on the "no see" list.
If your service is good and you keep your clients happy then you'll have work. If you go UTR with the hopes of getting more work, well again, how the hell can someone find you if you take yourself out of the visible marketplace?