Ok Saturday i finally reached the final Pot and was continuing to raid for points. I noticed i got after a while an additional 5k raid coins after a bit. If you go check the raid info, added to this raid and hopefully all future raids at 4mill and every 250k points afterward up to 10 million raid points you will be rewarded with an additional 5k of raid coins. Yeah it is not much of a reward but its at least something for raiding beyond the last reward listed now. This also helps you farm those potential hard to farm raid coin items like the 5* unit or their tmrs or even Trust moogles or 4* tickets.

TL/DR: at 4million raid points and every 250k beyond to 10 million, expect extra raid coins as a reward.