Maybe we've missed this as it happened between 2010-2013.

Project Spade was revealed to public on Nov 14, 2013 at a press conference at Toronto Police Headquarters. I think this is still an important news (widely copied by alternative media even yet), and especially important regarding pizzagate investigations because of:

As a result of the investigation thus far, 50 people were arrested in Ontario, 58 in the rest of Canada, 76 in the United States, and 164 internationally.

What was most alarming, Inspector Beaven-Desjardins said, was that many of the arrests were of people who worked with or closely interacted with children.

Among those arrested were 40 school teachers, nine doctors and nurses, six law enforcement personnel, nine pastors and priests and three foster parents, she said.

The news were originally shared by Associated Press, then at least by NBC News and most recently (like the one you found) by several alternative media sites. Worth an upvote from me at least, thanks.

edit: This one was an interesting add to my reads https://www.thestar.com/news/world/2013/11/14/child_porn_bust_how_police_worldwide_worked_together_to_bring_down_a_child_porn_ring.html