Is Rush-Wave a scam?

Instagram has RELENTLESSLY been advertising me rush-wave.com. They make awesome looking electric go kart PWCs as well as a cheaper version of a Jetsurf electric surfboard.

Their website is shady AF though. You gotta pay with crypto and they have no reviews...zero. Also, they are like half the price of what I expect.

Does anyone know if these things are real? I totally want one but I think it is one giant scam that Instagram allows to advertise. Has anyone seen them on the water? Have you seen any legitimate US seller carry them?