I seem to remember seeing advice that suggested it's a good strategy to publish the paperback version first, during the ebook pre-order period, so that ARC readers of the ebook have an immediate link to leave a review. Then, when the ebook is finally released and the two versions are merged, the reviews will accrue to the ebook as well.
Is that a viable strategy?
Since the ebook is a new product, does the 30/60 day new release promotion start with the ebook release or do they go back to the paperback release?
ETA: I'll be using my own ISBNs and IngramSpark for the paperback.
I've also seen advice that said the opposite - that you don't want your early reviews accruing to the paperback. I don't remember the reasoning, especially in light of the eventual merging of both versions.