I guess my ants are tough smart hombres. I used this around some mounds and even noticed some (very few) ants pick the bait up. A short while later the ants were moving their nest. My guess is that they test this stuff in the lab with the ants in a glass case and no other source of food and no escape routes. In general I have to say that my experience with fire ant baits is that the ants move but you do not kill off the queen. My best luck has been with Deltamethrin which does not kill the nest but makes life uncomfortable by killing any unlucky enough to walk in it and they move. It also acts as a killer/barrier for most insects.
Maxforce FC Fire Ant Bait is worthless in eradicating fire ant mounds. Having used Amdro to effectively control fire ants in my low country South Carolina lawn for years, I changed to Maxforce and the fire ants seem to love it. The mounds only seem to get larger, despite repeated applications, over the past month.
Thought I had Crazy Ants. Ordered Maxforce FC Fire Ant Bait with Fipronel which would have been effective. Infestation was out of control quickly so I called exterminator. He said I had White-Footed ants which do not carry control agents back to nests which results in colony extermination. Make sure what you're treating for is what you have!