Two weeks ago, I rather prematurely talked about the diminishing returns of KDP Select free promotions. I talked about an eventual rolling out of the KDP Select program, and why it isn’t even quite as important to newer authors as it once was.

That said, I had a BookBub promotion scheduled for my debut novel,What We Saw. I’ve been hearing a lot about diminishing returns, both with KDP Select free promotions and with repeated BookBub ads lately. I was curious to see how much of this was widespr...