So, just a heads up to anyone who is like me, and waits until just before the final Payment date, to ensure the best deal:
The RCI FCC is taking anywhere from 48-168 hours(2-7 days) to process at this time. So, call 8 days or so before the final payment date to apply the FCC to your final Balance!
My final date was 8/31/2020, and I called today. My Online TA was able to extend my final payment date to 9/9/2020 just to ensure the FCC went through.