How to get reviews

I found an article about book promotions for new authors. Some of the points costs some money, others only some time. As people asked here, how to do promotion without spending money, I will give you a resume:

You may subscribe to KENP and KDP Select. KENP (Kindle Edition Normalized Page) are pages of eBooks read by Amazon Kindle readers for free through the Amazon Kindle Unlimited or Amazon Prime programs. In return for allowing readers to read the eBook version free through one of these Amazon programs, the publisher gets paid $0.0044358095 per KENP. 4/10ths of a cent per page read may not be a lot, but: A book with 200 pages in length, 2000 readers gives you 400,000 KENP or 1760$ (if you find 2000 readers per month). Is this realistic?

* Pre-Release Marketing *
They send review copies to trade reviewers like Kirkus Reviews, Booklist, and more, but as far as they know, they did not get reviewed by any of the trade reviewers.
Outreach to Blog Reviewers

* Reviews *
They got about 1200 reviews at Amazon and more in other places. How?

- First:  create a list of 1000 book reviewers, bloggers, and influencers who have previously reviewed similar books.

- Second: Sent a personalized email to all of them, asking them if they would like a free review copy of the book. (no compensation for reviews, to not influence the reviews)

- Third: create a list of a few thousand reviewers who have reviewed similar books on Amazon.

- Fourth: sent them personalized emails asking if they would like to receive a free review copy. (no compensation for reviews, to not influence the reviews)

That can be done by other review sites as Amazon as well, e.g. Good Reades. 18 reviews of 1200 are from this promotion, probably more, but the others cannot been tracked. Furthermore, they create an own custom Amazon category (best seller list) research tool called Bestseller Ranking Pro.

If you have a free e-book, you may find free book promo sites to promote free e-books here.