In the third set of fortunes, there was one that said...
23. The Glimmer Rock Fortune
(Let it go! You'll trip on something eventually)
Chop down Old Log x 1
Rewards: Glimmer Shard/Glimmer Fragments per chop
What someone figured out was if you chopped on an old log twice and then started chopping on another old log, the fortune didn't end until you chopped a log for the third time. So you could keep the fortune alive for quite a while and just pile on the shards and fragments. You could leave the old logs littering your kingdom or sell them for 0 coins and get them out of the way.