Blizzard has nerfed the Frog Farm, preventing Frogs from dropping Lesser Charms. While continuing to drop bronze and gems, the farm has not been removed outright, but will be far less lucrative than before.
As many players have quickly found out, Frogs no longer drop Lesser Charms of good fortune.
While frogs drop bronze directly, Lesser Charms could be turned in to massively increase the amount of bronze earned from the farm. With this change, the frogs can still be farmed to easily generate bronze and gems without moving from one spot, but the actual amounts earned will be far less.