Holy Cow!!! What am I doing wrong? This offer is still there but when I add getting to/from MIA from MSY, then the cost jumps from $208 to almost $600. Boooooo.
MIA-JFK-ATL-SJU-ATL-JFK-MIA = 6792 miles, the dates I used were Nov.6-Nov.9 since I prefer to spend some time in San Juan. Maybe it has to be a pure run, or maybe the offer is not good if you tack on MSY.
P.S. I now see part of the problem, it has switched me from MIA-JFK-ATL-SJU-JFK-MIA to a routing through MEM which is not included in the sales price, obviously. Will putter a bit more and report back if I get a good run from New Orleans.