He is mentioning GTA a lot because the article is a warning to the big players. Today, you can repeatably clone games from 90s. Next year, Rockstar's moat against clones might be down to branding, lawyers and money. And the way the IP laws are going, lawyers might not be much help. And money might not help either if the clone is made by a behemoth like 10cent or Meta. Maybe Meta wants the Fortnight ecosystem but doesn't want to pay for Epic. Maybe 10cent wants a share of that GTA6 money and tweaks a GTA6 clone for the Asian market.