Just read the article:
https://www.ccn.com/ccn-is-shutting-down-after-googles-june-2019-core-updateInteresting.
I have a suspicion that a big part of their content being filtered is the larger number of right-leaning posts/articles that have peen posted in the past few months; just check their article title history.
What are your thoughts on the matter? Did you browse their articles regularly along with the other news sites?