I agree that the FanLincs are sub-quality, but back to my set up.
My outdoor fan is meant to work with a manual dimmer, which adjusts the voltage of the load sent to the fan, which determines the fan speed. Why is an Insteon InLine dimmer any different? My 6 button WallPlate’s load is wired to the Fan’s light and controls it perfectly. The four middle buttons on the WallPlate represent; Hi, Med, Low, & Off settings for the fan speed. I have a scene setup for each of the four speeds, and the scenes include the InLine dimmer at different speeds (voltages across the load line). Obviously, the load wire from the InLine dimmer is connected to the Fan’s power line. This has worked flawlessly for 6 months.