I still say that lowering rates, while it may be useful in some ways, will just attract bargain hunters who won't respect that the special is over ( I can almost hear groans of agreement from some of the ladies! LOL!). Some of us ladies have our own ATF's and some of us have given a special discount for these wonderful guys!
This is my prespective on an experiment like this: Lower rate = higher volume and exhaustion (or chapped lips!). Normal rate = lower volume and a relaxed session.
As I said, this is just my prespective. If it someone else finds that that strategy works better, its all good. I guess its about one's comfort level.