About a week ago I got rocked, unconfirmed update

Anyone else see a shift last week? I can tell if it was a bit of a penalty or unconfirm very weird update. I was on the losing end this time but I recently added a few RDs and that could of been the reason but this looks like I got his with a penalty as well for adding to many backlinks with same keyword. I am starting to kind of get the hang of this and can see mistakes. It could of been weird update as well, because some spammy unrelated content also ranked. The people ranked 1-5 never seem to move anymore in most niches, wondering what the reason for that. They you to shift a little.

Yes, it's real quite from their end this year. But updates are surely rolling out left and right.

It can be difficult to in point what the cause of increase/decrease of rankings is.

But if you made only few changes and recently, that's not it.