Here's a topic that's been discussed ad nauseam but there's nothing wrong with an update--nor, I think, is there really a precise answer. I'd love your experiences and input.
If interested, here's my situation. I have a brand new paranormal fantasy Phantom of the Opera adaptation up on preorder for $0.99 everywhere but Amazon. You all know the ranking thing with Amazon (it reflects negatively the longer it's preorder). So I wait till the last minute to preorder on Amazon. Got many reviews coming through Hidden Gems--which is always nail biting because they are from ARCS outside of my fans in my newsletter (I use services for honest review ARCs for all my books).
My plan is to leave the book at $0.99 for two weeks. I applied to BookBub new release--I'm not holding my breath with my very popular genre. Alternatively, I could apply to ENT and then, if I don't land ENT or BookBub, I could let my newsletter know that the price will go up after only a few days from launch at $0.99 to $2.99. That would push initial sales and ranking and then return the book to an introductory price of $2.99. If I do this technique, promos are out (which isn't necessarily bad, I'm beginning to think, if I can't land the biggies like ENT or BookBub anyway).
Now here comes the timing headaches (I already dealt with one scheduling disaster due to trying to meet the deadline with Hidden Gems. Don't you love deadlines?) Promos have to be scheduled up to two weeks in advance, but many need reviews. Can't show reviews until the book is up on Amazon unless you put a paperback up but, I find, most don't leave reviews on the paperback anyway.

I don't want my book to remain at $0.99 for too long. How do you all juggle promos for new releases with pricing? Can't make a whole lot of money with $0.35 royalties, right? So what do you all do?
I'll add one more morsel for others. I have used New in Books now three times and really like their services. They work very well for new releases and help organize a rush of promos at the start of a book release if your book is $0.99.
But, and this is a big negative, it is very expensive. And I'm not going to advertise there for every release. Not only that, I feel like if I did, the benefit would wane from frequent new releases by me every few months.