Just a bit confusing I found (could be a case on Fridayitis)

Best of 4 gives you the best price of the three Australian totes and the official on-course starting price. Top Fluc delivers the highest broadcast odds from the on-course bookmakers when you bet prior to the first fluctuation.

There product is Best of four, but here they just talk about Top Fluc, not the other totes.

I'm thinking you will be correct though, seems too good to be true otherwise.