They built 30 and they can be used at every trackday, but only if the Ferrari-crew is invited and around and only the official owner is allowed. I know one guy who nearly had the opportunity of driving one in Spa, but wasn't allowed by the Ferrari-crew, because it would "bring in false datas".... They recover every lap datas from all 30 cars for comparison of the 30 owners and officially for "developing new cars".... who knows?