I have read all messages here and I'm in the same boat..
For the first weeks of the update I saw only decrease in long tail keywords and no movement on main keywords. Now I'm seeing some weird results on main keywords and a ton of dances.
I don't understand how google is working but I have some sites that got only a "little hit". All of those are adding content on them on auto and a lot of backlinks I made kinda BH.
Other sites that I tried to create links a little more "natural" are all dying day by day.
One thing I tried on one site, made the site load faster and to be green on google speed insights. (Here I see an increase after some days, still don't know if is this the reason but...)
(on 99 because I have some js for ads etc)
I still think that going max BH (with those google updates) is the way I need to follow.
Now searched a keyword and from 20 pages (that I stopped) I saw 3 different sites (position 4 8 9) and all the other results are from 1 site? wtf is this?
F**K you G!