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"Are you a billionaire yet bro?" Paul asked him.
"Like, let's be honest, you're gonna be YouTube's first billionaire. Has it happened?"
Donaldson replied: "No. If I was, it would obviously be paper [...] because like actual cash, I'm probably the poorest person in this room."
When Paul said he doubted that, he continued: "Well if I make $3-4 million a month, I just spend it on videos and X-box.
"We literally have razor thin margins, and then just reinvest it all."
A taken-aback Paul then said: "That's wild! Is that ever dangerous? Does a video not ever yield the return you were expecting?"
Donaldson responded "Yeah a ton of them."
Paul, still shocked, pressed him again, saying: "You spend $4 million on a YouTube video!? What the f***?!"
Donaldson then clarified: "Well, four million dollars a month on videos, yeah."
Mind you, as MrBeast, Donaldson is used to going to the extremes for his content - having recently spent more than two days in a box underground for the entertainment of his 68.8 million YouTube subscribers.
In the 12-minute video extracted from his 50 hours underground, Donaldson talks viewers through his peeing process (empty bottles), and confesses he's been holding in his number twos while in the coffin.
With more than 30 hours left, he cried: "I wanna move around, but I can't."
He couldn't because he knew the deal was that if he got out early, his mates got to taser him. In the balls.
A day in, and the side effects of lying in a box underground started to take their toll.
He said: "My back hurts, I'm starting to feel claustrophobic, I'm bored out of my mind, I smell pretty bad."
After an hour of digging, his pals dug a hole down to his coffin to send an important message. A message on a piece of paper that simply read: "Penis."
Clearly this - and the fear of taking a taser to the nuts - was enough to spur him on, as he made it past the 50-hour mark. In fact, it was a bit longer than that by the time they got him out.
When he was finally freed, Donaldson felt a touch emotional - but no doubt ready to move on to his next stunt.
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