AoE farming and Chest drops

Ok I tried my first AoE farming on blu and it's really cool/fun. But after a few hr's of doing really well it seemed the chests just stopped dropping. I moved camp and tried other mobs and pretty much same deal.

Did I farm up all the chests in abyssea? lol

Not sure if this was it but there is a cap on how many chests can pop at once within a zone. So if someone else was AoE farming the chests would get split up essentially