I went through about two hundred lockboxes before giving up on opening the rest. Hopefully they make improvements to the system moving forward - in many ways, FFXIV is quite behind in terms of quality of life features. The materia isn't bad - especially since it can be thrown at Mutamix for a chance to morph into high end crafter/gatherer materia will sells for a pretty penny. Yet ironically although they reduced the amount of fireworks they, at least, stack - gear doesn't.
...and the gear is going for near enough vendor price on Balmung. >_>
I'll be throwing excess orchestrion rolls and Eureka minions in my retainers for now. When Eureka dies, the price for those will skyrocket.