Sevenless wrote:It's just the global pool drying up as more people capable of seeing them forage caves.
This.
I'm not able to get 30 glimmers in a day or a pearl every ~100 mussels any more. I've heard some people cooking up to 700 mussels for a pearl nowadays

I'd suggest trying to go looking for glimmer when there are less people online, if you have anyone in your village that doesn't play at peak times, that is.