World Record Dodge diesel dyno 3336hp

They are popular everywhere, but that wasn't my question. Are vehicles like that used for research for more power? JUST the dyno competition? Do they race them? Let's narrow it down to THAT particular truck. Does it have a purpose beyond the dyno challenge? If the just built it for bragging rights, that's kinda dumb. That's what I'm gettin it.
Just to show how small his pecker is and how fat his wallet is… :lol: