[novok]

I think it's still legit to think of what they did was turning off the algorithmic filtering, but did not turn off the algorithmic event generation. To be fair although, group and friend posts are things people explicitly subscribed to, it's only the friend comments that they didn't explicitly subscribe to. Which makes me think, did they do a version of the experiment without "people commented on X" items and see what happened?

I think the results would be somewhat similar although, because group activity will still dominate. Knowing a place like FB although, they probably tried all the combinations to see what happened. I'm curious what those results are too.