How can you possibly say Facebook and Google CAUSED this? You just made my point in your statement above...

"while there are many factors in markets..."

It can't be proven what caused the drop!

Which is going to be a major issue in any court.

Not to mention markets go up and markets go down. Should short sellers sue Facebook and Google for allowing crypto ads in the first place that (by your logic) allowed prices to run up like they did?

By your logic, they should!

Plus Facebook and Google are not required to show ads of anything they don't want to... They are a private company! There is basically a zero percent chance this lawsuit holds any water in the slightest.