Well, you know the old saying: "One Planet, Zero (Cyclone) Engines".
With all the Great Tbings in Frankie's plans for now, such as the Mark 1 engine going into commercial production and sales, and the Mark 3 going into production and sales, and the Mark 5 running off solar heat, and the Mark 10 engines entering production, you'd think there'd be videos of engines powering things. And testimonials from happy initial customers.
Maybe Frankie was just "overoptimistic" again.