These 3 promos were never publicly announced from the onset. I had always thought that they were kind of "targeted" and I only knew about them through blogs and forums. They are also not renewed in the usual sense and more like unofficially extended. As such, if you had registered for the "Stay 3 times and earn up to 10,000 bonus points" and earned the points over 3 stays in 2014 or 2015, you would not get any more points under that promotion. The 2,000 for each night and 5,000 for every two nights however (from reports) are still good. You do not have to re-enroll. The points just appear after the stay.