Default judgements are trivially easy to avoid. You avoid them by showing up in court and doing what the judge tells you to do.
This particular default judgement was huge because Jones had accumulated years of ill will with this particular judge across multiple lawsuits by acting like a massive faggot during discovery. The list of things he did in the judgement is downright embarrassing to read. So what the judge basically ruled, "I am sick seeing your stupid face and dealing with these stupid antics. How much money do I need to fine you to end your business make sure I never have to see you again? Oh, it's almost a billion dollars? Well fine, you owe a billion. Now fuck off."
Jones has subsequently lost all his appeals because it's a default judgement, so the only real question is, "Did you actually show up and do as you're told, the trivially easy thing you needed to do in order to avoid this fine? No, you didn't? Well, sorry, pal."