Does it sell as much as COD franchise? No
Does it sell absolute gangbusters? Yes. 175 million for GTAV so far.
I'm sure it's just your anger today that's made you make the ludicrous claim that an IP like this wouldn't receive regulator scrutiny.
the CMA concluded that MS has no incentive to keep COD exclusive post purchase. What do you think they'd conclude if they did the same research about Sony for a largely single player franchise like GTA? Especially given Sony's history.
Even worse when you throw in RDR