It seems that $1.3bn is not a completely unreasonable amount of damages. And in the USA, there is no penalty for asking for more than you actually expect to get. And if they figured that Giuliani has $45 million, sued for it and got awarded half, they would be kicking themselves. There would also be hope that they could take the court result and go after the $200 million that Trump apparently collected claiming it was for election lawsuits.
In Germany, there is a penalty for huge damage requests. The court will decide first what amount of money the case is about (Dominion: We want $1.3bn. Giuliani: I'll pay you one dollar. Judge: We are arguing about $1,299,999,999). That decides the cost the court will charge, and what the lawyers will charge. The problem is that if Giuliani is ordered to be $130mil, that would be 10% of what is asked for, so he'd pay 10% of both sides' lawyers court, and 10% of the court cost, and Dominion would have to pay 90%. So there you use a realistic number, otherwise you can "win" the case and still end up out of pocket. So the same case in Germany, they would have asked for less.