It was meant to celebrate 50 years of Star Trek. Since celebrating 51 years of Star Trek doesn't quite have the same ring to it, I expect that pay subscription is more likely. The worst outcome of all would be to do a Firefly - show only some of the episodes, completely jumbled in order, move it to a graveyard time slot, cancel it, and then never show the final episodes. At least on pay subscription you know you are getting all the episodes and can watch them at your own convenience.