This film is close to being decent, but a few key decisions keep it from getting there. The main problem with Lords of Scam is that it focuses on the wrong thing. While it does an okay job in the beginning explaining exactly how the scam worked, what the loophole actually was, and how scammers were able to steal millions of euros, afterwards the documentary does a poor job at editing itself. Overly long by a good 20 minutes, most screen time after this initial info dump happens is given to Mardouche "Marco" Mouly, one of the main players in the scam. Viewers visit him in a variety of contexts, environments, and scenarios as he often discusses aspects of his life with friends, ex-friends, and anyone who will listen. Incredibly charismatic, verbose, and commanding, Marco has an intriguing presence, but the film indulges him to the point that some viewers may not have big appetites for a showcase of narcissism.
Further, at some point, maybe half way in, many viewers might also realize that there might not be a lesson here, as there certainly isn't one for Marco. Sure, he had to endure 7 years of prison, but he's surely still incredibly wealthy (despite his protestations to the contrary), continues to live a lavish lifestyle, and now has a documentary out that primarily features himself in all his confounding glory.