Zeta doesn't drop anymore.

Fattaro

From my last 8 zeta challenges i get 0 zeta item. How it can be? There is a possibility to x2 pcs of zeta. This means 16 zeta but i got 0. This is not fair. With this drop ratio, this game just been a boring game. How can we improve our toons without zeta? I wasn't expecting to drop zeta from each challenge but at least, I expect 1 zeta from 2 challenges.

I know this topic meanless for developers or persons who work for EA. Nothing to change even i wrote too many things.

I really want an explanation from someone about this drop rates. What they do with this drop ratio instead of me?