On our earlier trip in Aug, I booked at like $188 / in pts and then stalked SW for price drops! Suddenly it dropped to $110 after weeks and weeks, so was very excited and rebooked then. Well, next morning I still checked and lo and behold our way home trip dropped again to $102 so changed again! Didn't expect that at all, lol!
This week I had to rebook our Aug trip there, which really made me cringe since it was a good bit higher, lol, but DD26 agreed to go earlier so we'd have the day there. So right after we decided that, I was watching and the fare was at $180(which i had paid $110 in pts. at for our later flight time). So, checking at 3 a.m. before bed, it suddenly had dropped to $142 so I booked right then instead of waiting till early morning, just in case it doesn't go lower. That was hard to pay another 4200 pts after saving originally but want the time there more. But, expecting nothing, I decided to also check our way home that we had for $102 in pts,. Was shocked to see it was $94!! So, stayed up til 4 a.m and rebooked that too and got back almost 1200 pts so that was helpful in offsetting the increase in the other! Luckily, I stayed up and rebooked right then as a few hours later it was back to $180 there, and way back home was up to $107 and then a short time later, up again to $137 for the way home. I would have been so mad if I had waited figuring the price would still be there if I waited till I got up for the day!
My point is, always keep stalking, even at odd times when you think things won't change cause you never know when that price drop will come! If you only check once a day or every couple days, you could easily miss any change that may happen!
I also think maybe they hold back some seats as another earlier poster suggested. No way they have no seats available when they open the new booking window, so I think they must hold back some that show up as sold out. A few years ago, they opened and the morning flight we wanted had no WGA fares. A couple months later they suddenly all opened up and were not sold out again after that. I got the flight I needed and then a couple price drops, as well. So, I'd stay alert to when those WGA fares do end up opening!