Didn't the film say they sell 200 cars a year. Difficult to see how that's enough to pay for the facility, staff etc.?? Without the US market and at those prices they will suffer. Cheaper ones probably make more sense, especially since I believe most buyers of $200K type cars don't really think fibreglass is special enough.
My 11 year old son likes them, though! We saw one in the carpark at Goodwood Revival.