I alredy have a budget to get Tableau PrepConductor to schedulle automatic refresh for all our flows.
The licenses are so expensive with a min of 100 license to buy, 1 license 5.50 USD. It`s completelly insane. Even more expensive than a tableau creator license or Tableau prep, no sense.
Now, Microsoft is launching a kind of prep to Power BI, sure they will have better success.