Well, if the first batch was a result of a failed sale to some country/agency and ended up being shipped to the US for sale, I can believe it. I own one of those (fairly rare) S&W N frame, 4" barreled, fixed sight, small grip, .357's made for a NE state (don't remember if it was NY or PA) police department that refused the production run back in 81 or 82. That stuff happens.
Then, once that first batch got over here and everyone went wild over them maybe CZ took notice and decided to try a true production run intended for the US market. Based on the excitement over this run, maybe it'll become a regular production item.
CZ is not a big outfit and they make a tremendous variety of models/sizes of handguns (compare the CZ product list to Colt, S&W, SIG, etc.)
Maybe, when CZ expands production facilities, with that new US production plant, they might increase availaility not just through increased capacity from more "machines" but also from cleaning up their production cycle by splitting up production between the plants to allow longer runs (resulting in less lost time for change overs and higher efficiency by staying "in the groove" longer).