The current 60k point credit card bonus offer reportedly ends October 1. See
http://www.flyertalk.com/forum/south...l#post28844849 (post 31 of that thread). The thread explains how you can delay earning your signup bonus until 2018 and count it toward your 2018 and 2019 Companion Pass. The window is closing for this 60k offer, so it's decision time.