Thinking about the Gadgetorium ruling about Post-A-Tron and the recent spoiler with a somewhat similar React ability, I was wondering when these abilities could be used again.
The rules for not being able to use an ability once per day only seem to show up under the "Actin'" Noon rules for Repeat abilities.
Even so, you can only use each ability on a given card in play once per day. However, any ability that
includes the word “Repeat” before the colon can be used multiple times per day, without limit
Are React abilities used before the game starts considered to be during the same "Day" as the first turn, as defined by the rules for Repeat abilities? Section 5 seems to imply that a day encompasses the rotating phases of Gamblin', Upkeep, High Noon, and Sundown but doesn't say anything about Reacts that would occur during the Setup defined in Section 4.
More generally - When I use an ability during setup (that doesn't specify it only is available during setup, like a Grifter ability), when can the ability be used again? On the first turn, or on the second turn? Why?