Because the nerf was supposed to hit people that did an inordinate amount of frog farming:
So it’s supposed to target people who did frog farming for hours to days, not people who did it for maybe 20 minutes and left, or people who just happened to be in the area doing other quests of which the frogs are legitimate targets for said quests.
What’s especially puzzling is that I got the 40k bronze for being a good boy, then nerfed to 2500 all stat+25k stamina when I logged off and back into the game.