We're flying from Newark to MCO 2/3-2/6. I had already checked the other day and my return flight dropped from $99 to $79. After seeing your post, I checked again (not sure what I thought would happen). Imagine my surprise and pleasure when my return flight had dropped again to $69. So I now have $150 credit in my account (5 tickets). This morning I checked again and the return is back up to $79 so I scored $50 at the right moment.
Now if only my outbound (which I purchased at $119) would see a decrease, but it's up to $174 at this point. Oh, well, I think $150 credit is great, since I've never been able to get any in the past. I've always had tickets that went up rather than down.