Yeah I didn't want to make a fuss because I think the flight may have been J1 but there was not actually any actual seat left to assign. By the time I got to the ATL gate it was too late to go back to the BOS gate. Additionally I did get $200 for getting home earlier too which was super nice and I even got more MQM for flying less due to the 200% MQMs I earned. So all in all not a bad experience, but I had just wished that all of the bargain had went through.