Try a test and have your own analysis.
Everybody cut their profits to see how it works.
Do you think they will share their analysis?
Also @Stattie have some cool report about this. Try to refer those reports if it helps you.
Anyway, my own experience, when I keep at high price, it sells better than the time in sale off.
So in fact , I think, sale off is only for exposure purpose or intro purpose, not for earning more.
Sale off will let more people to know about your product & core code development, builder, …ultimately it is for PR only.