Yeah, DL's pre-SkyMiles FF program could be really something, what with the 1,000-mile segments and threshold bonuses at 10K increments. For two years in a row they also did a wintertime mileage sale with BKK at 40K miles.

OTOH, ATL didn't have much in the way of LCCs for a couple of years after Eastern's demise, so you either had to drive to BHM for WN-matches or try your hand at the hidden-city game.