The US Champion usually gets picked for SA and the others are chosen from summer results. Since Alysa can't skate in the GP, Bradie as the top ranked US skater this season might get the nod again.
I think the discussion refers to the wildcard slot the US has, as host, for a skater who would otherwise not have any GP slot. While Bradie would probably get SkAm, she has earned 2 slots and would not need a wildcard slot,