The most common cheat is probably gaining money or experience, but there have always been pretty extensive mod menus for GTA Online with tools from invincibility to making your vehicles rainbow, to randomly causing other players to explode or setting hundreds of muggers on them.
In 2015ish, I used to cheat, other than getting rich, all I was interested in doing was making an indestructible chrome bus with smoke trails that I’d drive around picking up players in, to teleport us all to North Yankton and back like a tour guide.
I actually doubt it. 30% of all of Hasbro’s revenue comes from WotC (I’ve heard higher than 50% before, but a quick Google says 30%). Of that I’ve heard people say as high as 90% of WotC’s income comes from Magic: The Gathering.
Artists are paid a set rate, not commission for their art, but thousands of cards are purchased at very little cost to WotC. It’s a golden goose that is literally keeping Hasbro afloat, they’d be fools to touch the operations of MtG with a 10ft pole, nevermind replace it’s core with AI.