I don't know what to make of this most recent change in fares. These fare changes are mostly in the H, V, and Z fare classes, so availability will be somewhat better. But they are only valid noon Monday to noon Thursday and then afternoon on Saturday (till midnight).
Also, quite a few of the very cheap $58, $78, $98 Southwest-matching fares (Z class) are now gone. Though these were fares were highly restrictive Tue/Wed/Sat travel with exceptionally limited availability.
From the wording on the internet about the 2,500 mile bonus promotion I don't quite get it. Is it 2,500 miles per booking for everyone? Or just for first-time bookings? The rules look like they were written by a 10-year old.
http://www.twa.com/specials/10percent.html
It will take some serious sifting to find anything of value in these fares.