The idea of selling the LAs only through the broker is, I believe, to create a strong demand for Arkoins and stimulate key crafting and in turn the whole treasure hunting profession. Half of the treasures are used in making keys, and if MUs on at least some of those are above 120%, a good treasure hunter can profit or at least break even. Even if the MU of Arkoins is only 150%, I think we'll see a consistent increase in treasure MU as a result. Let's not forget that the UL swords you get from instances have become a bit more valuable now that they go down to 3%, making instances a little more profitable. Also, as demand for arkoins increases, we can probably expect to see them drop more in loot. Unless the "hoarding" interferes... but I'd expect the balancing team to be on top of that issue.