So I tracked 2,000 drops

I call nonsense! There's no business alive that would keep the same drop rates when they could change them up and down in order to drive people to spending crystals to buy them instead. The drop rate for cuffs must be closer to 10%. Given a fair drop rate %, I always 3-4 at a time which should yield the potential 1 in 3 or 4 %. I blank constantly!! I have never received no more than 1 if I sim 2 or 12 together. It's always 1. Which means they aren't using a normal % rate.