You know, before 2011 they left a copy of their algorithm open for their developers. It's about 8GB and there are still a few copies floating around out there. Of course they can change a few lines of code and everything changes again, but some folks found a way around that. Rather than reverse engineering the algorithm, it's behavior can be measured and changes noted when they happen and reacted to on short order. The only thing a search engine can do about that is shut itself down.

One thing search engines can do is simply de-list unwanted sites; it's 100% effective, but they refused at that time. They do exactly that now that they face some expensive fines.

Anyway, I'm out of that game; I spent enough time on that and I prefer to move on. Hope any info I shared in this thread helps those that need to better understand that these search engines are manipulated by both their owners and outside actors. Greetings!