I do not endlessly promote my books for many reasons.
In no order:-
I got tired of trying to force sales, the constant worry lead me to change my policy this year https://hereiamattheedgeblogspotcouk.wordpress.com/2017/08/19/i-am-writing-for-enjoyment-now/
Blogs that become book blogs get boring quickly - I know I've read many.
Endlessly pushing books WILL lead to a stagnant blog because sooner, or later, you WILL run out of things to say about the book.
I learned after my award-winner that no hard and devoted you are to pushing your book, in the end, it won't matter as the reader is the ultimate judge.