I'd say it's not a scam...looks like just more stringent requirements on the detergents that are added to the gas. I'm glad they're setting some standards, cuz I think one ways the discount gas places save a few pennies is not adding detergent. I suppose you could mitigate this by just adding the Chevron Techron which BMW sells under it's name for injection cleaner and all. But it seems it's better if that stuff is in the gas to begin with.
But I do agree, you're not going to see your car keel over and die cuz of the detergent level in the gas (hopefully). But I think over time they see a difference....like in the 100,000 miles + area when you're replacing oxygen sensors and emissions stuff, maybe.