Booking and buying tickets
Ticket booking and buying services (air, rail, bus) are very popular due to their convenience in selecting routes, travel times, and means of transport. With the help of API technologies and affiliate programs, anyone can create ticket booking sites - which "anyone" uses, competing in the attractiveness of design, user friendliness, and the breadth of services provided.
But competition, which is good for a potential buyer, creates problems for the owner of a ticket buying site.
There are thousands of cities (stations, airports, bus stations), and accordingly, millions of routes between them. If you are the owner of a ticket booking site, it is important for you to get into the search engine results for as many queries as possible for such routes. How to achieve this?
A site of a million pages
Of course, the most logical way to quickly answer a query, for example, "train tickets Budapest-Vienna" is to have a page on your site called "Train tickets Budapest-Vienna". Budapest-Vienna" with relevant up-to-date information.
Technically, it is feasible, but how to make Google crawl all the pages of the site when there are thousands and thousands of such pages?
Submitting the site pages for indexing manually, via Search Console, is obviously unrealistic with such a quantity.
What to do?
Bulk indexing service for site pages
The owner of a ticket purchase site needed to submit about 400 thousand pages for indexing at once.
When submitting a link for indexing manually, Search Console promises "a minute or two" - in fact, it took us an average of 45-50 seconds. That is, submitting 400 thousand links is 300 thousand minutes = 5000 hours = 208 days of continuous work in Search Console. Or, if 8 hours a day - then 2 years of working time. In principle, it is not so impossible (joke).
With such a number of links (pages), naturally, only one tariff of the 2index.ninja service is suitable, the most powerful one - namely Black Ninja: 500,000 links at a price of $ 0.0017 for each. A very significant discount, considering that in the SmartNinja tariff (single payment - price $ 0.0067).
So, 400 thousand links went to indexing. What is the result?

Let's look at the Search Console graph - the most accurate indicator from Google itself.
Not immediately, but literally in 3-4 days the number of indexed pages of the ticket sales site jumped to 450 thousand!
Before working with 2index.ninja the number of indexed pages was around 70 thousand, plus 400 thousand (actually a little less) - submitted, a total of 380 thousand pages were added, or 95%! Not bad at all.
True, then a small rollback began, but here you need to look at what is wrong specifically with the pages that fell out: perhaps they have gross errors, little information, etc. Obviously, after correction, they will quickly return to the index - because they were there already!

How did this affect traffic?
It is clear that indexing even thousands of pages is not an end in itself. Something else is important: the growth of organic traffic, visits from SERP, search engine results pages.
What do we see in this case? With some time lag (the number of indexed pages changed on 12.01, and we see an increase in traffic only on 27.01), but traffic jumped sharply (4 times), and in the next graph we see that organic traffic played the main role in this increase.

Moreover, the same picture is observed in other search engines (Yandex):

That is, the following obviously happened: a sharp increase in the number of indexed pages of the ticket sales and booking site made it possible for the site to appear in search results for a large number of low-frequency, but precise queries like “Budapest-Vienna train tickets” (and thousands of the same), which led to a sharp increase in organic traffic.