That cannot be answered with 100% certainty because the 20 max limit isn't suppose to happen til Garuda/Typhon rematch, which we got 12 events early. In the case of Garuda/Typhon rematch, it is 20 max with no resets and this becomes the norm for every following advent event in DMM.
We cannot be sure that the advent events in within the 12 that were suppose to be before the rematch will adapt the updated exchange rates or still use the old 2 a day limit. We will have to wait til the next advent event to see what Nutaku does.