Be wary of changing plans if you're currently on Flixie and still have a way to go to the end of your 6 months.
In my case Flixie runs out in May, if I change to Earnie today then my Generation cost goes up 2c/kWh and I add a further 1.85c/kWh for the "Earnie Fee" ("Flixie Fee" is 0.15c/kWh). So I would be paying an extra 3.85c/kWh +GST for some rewards which sound exciting but are (I believe) intentionally difficult to quantify.