I have three questions that I didn't see addressed in the T&C or the Q&A:

1) Can I book during the promotional period the qualifying flight that needs to be flown in September via SWABIZ, or does it have to be purchased via Southwest.com?
2) If, on the day of the qualifying flight, I make a SDC to fly a different flight that day, does that disqualify me from the promotion?
3) If, on the day of the qualifying flight, I fly on an earlier flight using the new same-day stand-by rules, does that disqualify me from the promotion?