I don't think the data supports their conclusion.

> the Facebook outage started at 15:24 UTC.

> Between 21:00 UTC and midnight, we saw roughly a 2.6x increase in the number of Pull Requests being merged.

> midnight UTC aligns with 17:00 Pacific time (where many Haystack customers are located).

So even according to their own metrics, there were 5 and a half hours where the issue was (at least partially) occuring but there was no change.