Truth is EFGO was trading quite often at .0001 (pre split). That's a value of .10 post split. In which case .08 is merely 20% below pre split levels. If you took a mean of trading pre split it would translate to roughly .00014. In that circumstance .08 post split would be 42.8% below pre split levels. Hardly a 250% drop.
This doesn't take into account that the trading post split does *not* have the potential value of a divy attached to it. So one would expect MONA to trade lower than pre split EFGO. In other words the pre split stock had more potential value than the post split stock.