You'll still in the range (800-1200) for the super rare. Just because most people got it before 1000, it doesn't mean that's going to happen for you. You could be one of the unlucky ones that had to go up to 1200 pulls. Like everyone said, pulling for a super rare on a free pull can happen but the drop rate for it would be very low. I got chiyo's ten puppets on the seal treasure as a free pull and apparently she's the super rare of that treasure.