Basically, we want to play an Insolent Neonate on turn one and/or Ravenous Bloodseeker on turn two, and use these discard outlets to generate a huge advantage with madness cards like Bloodmad Vampire, Incorrigible Youths, and Avacyn's Judgment to win the game before our opponent has a chance to recover
Copy them
Even better, if you have ways to steal opposing Commanders, you can exile those instead to jack up their Commander tax
On top of that, it shuts down counterspells and damage prevention entirely, so its a nightmare for control decks and fog strategies
For example, if you scry 2 and put two lands on the bottom of your library that you had absolutely no use for, people will often describe this as drawing two cards. Of course, you didn't actually put any material in your hand, so you didn't actually draw anything, hence the virtual card advantage