My take on the article was that the combination of their tax data, the financial data from their prior acquisition of Mint , and with the tax+credit data that will come with this acquisition Intuit would have one of the highest quality financial profiles on most individuals. I am trying to think of any other financial entity that has such data and I am drawing a blank atm.
PS: I never used Credit Karma but had been considering it though I could never get past the 'if it is free, then you are the product'.