I did a RB a couple of months ago, followed most of the good tips noted on here, including posting a whole 2 weeks in advance, but was very disappointed to only get 2 replies.
One of those was from a noted regular bidder who I wasn't attracted to and the other, someone, who despite looking promising and dropping her rate, only did outcalls when I was looking for incalls.
I don't know if it was the timing (early Sunday evening, outskirts of London) or that I stated that I did not want to be contacted by any fake profiles/B&S, but it has left me dubious about trying it again.