I can't be assed to read this entire thread but looking at the poll, imo, isn't the issue just over-saturation? Too many people farming the same thing = prices fall on that thing.
I would say just farm a different market but I feel like the amount of options and content we have hasn't grown parallel to the growth of the community population. Pretty much every market is saturated now because they've been farmed into the ground, nothing new to be doing (aside from holiday events but those are few and far between) so people turn to static money making methods (selling berries to NPCs, rematching gyms etc.) where they don't have to worry about market prices or if things will sell or not. It's guaranteed money. And it can be done on alts for even more profit. I don't fault people who do it, it's probably the smarter thing to be doing right now. But if doing THAT is better than actually participating in the economy then there's a problem with that economy. For sure.
Oh well, just buy a limited vanity and wait a year, you'll be rich, it's fine. lol