SEO and backlink automation, how do they do it?

Question

Search Engine Optimization

Hello, guys, tell me, I see advertisements on the exchanges for the sale of links and backlinks with high DA ranks (*DA - domain authority). And the score goes to hundreds of links. The question is how do they do it, it is clear that these are not private blog networks (PBN - private blog network), but simply profiles, perhaps blogger.com/wordpress.com/twitter and so on web2.0 posts, here is an example of such an announcement, a person offers more 1 thousand links, how do they do it, automatic systems?
I heard for xrumer a long time ago, is allsubmitter it or not, and how can I do this for my own purposes?

Thanks

Answer 1

So order and see, worth a penny, why guess

Answer 2

It's just a money scam. IMHO.

Answer 3

I am using zenka