I started fishing for OTDGA long time ago in howling fjord. After 1500 catches (and no Dark Herring) I decided to fish for something that I can catch semi-afk. You know, flying around and looking for pools need more attention than fishing open water.
After 3000 catches and many many many episodes of Stargate SG1 I finaly got my 15 pound mudsnaper.
After many people here did report about very frequent dark herring catches I thought "Give it a try, as long as they don't fix it (you remember the old crafty thing...). If there will ever be a follow-up (catch 2 or catch all...) I'll have less work."
After ~150catches I got a Dark Herring and OTDGA does NOT count it!