So they did boost the refine rates during the event.
You know back in the day they used to increase the rates during a forging even and then lower the rates back to a much lower value than they originally were, you could test this by simply refining low lvl stuff before-during-after the event (few 100 times each) and then compare the results (N = high).
I'm fairly sure they're doing the same at the moment and it's utter BS. The GM's are a load of wank that is.