If they can avoid doing, why should they?
The lower your score, the more money lenders can charge you for loans. If your score goes up (because of diligent and quick updating with the friendly CRA), then the amount people can charge you for loans goes down.
These same lenders use (at least) EX to give them information about people whose credit scores are improving. In turn, guess who gets more business when they need to run credit.
Here's my take: It's a race to the bottom for the 3 CRAs. Whichever one can continually keep its average FICO the lowest will win in the marketplace. Experian is winning. In fact, I would bet the house that Experian will be the ONLY cra within 10-15 years.