Would there be significant disadvantages in using both platforms at the same time? Or does "pivoted to FB" also imply that the content was adjusted to FB audience?
Using, no, but at some point there will have been meetings about where to use the marketing budget.
"We can buy Facebook likes, or YouTube subscribers."
"Engagement's so much better on Facebook, let's buy likes."
Facebook's incorrect (dramatically so - as high as 900% inflated) stats made buying a like look way more cost effective, so that's where the budgets went.
