There is a very obvious value we can assign to the outbound traffic from FB to the news sites (based on their typical advertising CPM), so we know the news sites are profiting.
We can also infer that the effect is significant based on how much the news organizations are complaining about losing this free source of traffic.
On the other hand, FB is willing to block news links, which suggests they don't actually profit from them meaningfully. Nor does blocking them, or winding down the dedicated FB News product, appear to be causing any hit on their user or revenue numbers.
Now, you turn. How do you know that "FB heavily profits" from this?
