Congratz, you won all the chests, 314. You open it up to find none other than... A crap load of gravel!
=O True! Me want all those chests. Although mining stone with an eff5 would be faster and could earn the same amount. xD
You could pay somebody to do the LWCS and then pay them the amount the chests are worth, then if anything is in it you could keep that!
Changed my mind...I'd only take the chests if they were filled with non-coal and non-stone mining goods, along with their respective ores or blocks.