Is it normal publishing is a dream of rich people?

As others have said, what you've encountered are vanity publishers. They've been around in different forms ever since the invention of the printing press.

If all you want is to see your book in a form that looks like the classic image of a book so you can give them away or sell them yourself, then going the vanity publishing route is fine. But if you want to actually make some money from your efforts, then it's not the way to go.

Real publishers don't just deal with producing neatly bound stacks of paper between two covers; that's the job of book printers (which, in reality, is all vanity publishers are). The main work of publishers is using their experience and contacts to get a particular product noticed in a horrendously competitive market. Genuine publishers don't ask for money up-front because their impression of a certain book is that, with some investment in things like editing, cover design, getting positive reviews from reviewers, and schmoozing with booksellers, they can create enough of a buzz about that particular book to at least recoup the expense of all their work.

Writing is art, but publishing is business, and it sounds like your knowledge of publishing is sorely lacking. It was always extremely difficult for new writers to break-through in the traditional model of publishing. However, these days literally anyone can write a book and have it published and up for sale on Amazon's Kindle platform and other e-book sites. So you could probably could have your book up for sale on Amazon by this time tomorrow if you put your mind to it.

But of course that doesn't mean you're going to be able to buy a mansion with the income from that. You might not even make enough to buy a can of Coke.

Being successful on e-book publishing sites requires the author to learn some of the skills of traditional publishers such as cover design, as well as how to promote books in the current market. And perhaps I'm being grossly unfair to you since your OP was probably tapped out on a phone with the typical casual use of punctuation, but I'll just mention in passing that an awful lot of the self-published e-books I've encountered were desperately in need of a decent editor or at the very least a competent proof-reader.

You're looking at the wrong places. Very very few people get published, and yes they get paid for it. What you've stumbled into are vanity publishers who make a living charging people to publish their books.

Tldr: do not pay them money vanity publishing is essentially a scam.

If you actually have something worth reading that appeals to an audience, then you can find a publisher who will pay you for it. However, for your 1st book you are not likely to be paid much. If its a good success you can get paid more for your next book.

Most authors who have gotten published with a paid arrangement discuss being turned down by 10-20 publishing companies before finding one that accepted their Draft. I've heard of cases where its been over 30 publisher rejections.

Even the best seller in the last 15 years (millions of copies, and translated to other languages, now used as a textbook in High School and College: was on the NY times best seller list for like 5 years straight) was rejected I believe by something like 4 publishing companies before Rebbecca Skloot found one who would publish it ("The Immortal Life of Henrietta Lacks").

To find these publishers a 1st stab is to look in the book store for who publishes the books in the area you are writing about, or in related fields (Tom Clancy was rejected many times for "The Hunt For Red October" and finally was accepted by a small publisher of military history and technology: it was their 1st fictional book ever - and it and the following books have sold mega millions of books although I believe a larger publisher purchased the rights to the series - including the 1st book).

However, I'll be honest with you on your current work. You have two major strikes against you in regards to publishers who pay you. 1) you have already published in on the web. Thus, they cannot own and control the copyright. Many of the publishers do work with their authors to allow article and sections to be published on the web... after they have signed the deal with you and control the copyright.

2) you mention that your book has had a few hits on the internet. Why is it not 10,000 - 100,000+ hits. I'm not sure you have a book that is of much interest to other people.

I've got a bestseller book from last year (1st edition) where the author wrote on Medium for years to hone his writing skills, and then picked up Magazine contracts for articles. His articles on Medium often had hundreds of thousands of hits. That evidence showed the publisher of his 1st book that people were interested in his general topic area and liked his writing.

There are writer development groups in every city in America. They help you develop your ability to write, and can help you determine which publishes to submit to once your ready for that.

The other option is vanity publishing - where you pay someone to publish the book and then you try to market it.

I only know of 1 vanity published book to break into the profit side of the business in a big way, although I have heard that a few others did become profitable (and I have books from several vanity published authors that have never become - and will never be - profitable. "Rich Dad, Poor Dad" was originally vanity published by Robert Kiyosaki. It became a NY Times Best Seller and another publishing company picked it up and paid its author well. There are now a whole series of "Rich Dad, Poor Dad" books on financial and business intelligence.

I wish you well in your desire to be paid for your written work. I do suggest that you find a local writers group to assist you in developing your knowledge and skills.

Agree.
I'm a writer too I have come across with so many issues like that.
Majority of writers are passionate writers. But 100% publishers are for business.
When I was troubling to do my first book, majority of the people did ask for a security money for marketing saying they can't take a risk of failing and loose money. And I need to cover their marketing fees which not be repay even if your book is success.
Also publishers go for translation books mostly because it's marketing free and very law amount of payment to the translator.

Being a writer is phenomenal I think. But when it comes to publishing, that art is almost buried now.

People still read books and books store still exist. Why would I not publish?