Here is an account I was struggling with in December (split by source). I thought it was interesting...
You can see she saw a spike when I optimized her account and got started in October. We continued to see slow and steady growth until December when the pins I created dropped. However, pins that others created & saved still continued to get traction. Weird. *Note - During these months, I've only created fresh pins. Most have been scheduled through Tailwind and some published manually on Pinterest (Video and product-tagged pins)
On the plus side, at the very end of December, it looks like it's starting to look up again.
Just curious as to what others are seeing when they split by source.
I think it's due to a Pinterest update or spam sweep that happened on December 14. It happened to me too.