Drop rate of giant eyes
After opening hundreds of those bags from events in cursed shore (the grenth event is fairly generous with those bags, I believe), I only received only one giant eye. One! It’s still in my bank, in case I ever need to use one. I distinctly remember opening it and thinking “What. Is. This?”, at first thinking it was part of the halloween event.
If you really want to get one from a bag, good luck with that. I sincerely doubt it will happen anytime soon.
Giant eyes are on par with lodestones. Extremely difficult to farm. That’s why their price will continue to increase. If more recipes come out involving the eyes expect them to reach lodestone prices e.g. 1g+.