So, all colleges started accepting the ACT or the SAT without preference about 2 decades ago and what happened was the ACT never had a guessing penalty so a lot of students started shifting to the ACT in favor of the SAT to the point that the SAT had to change their test to be more like ACT to continue to compete in the marketplace with them. And "compete" might even be misleading because they were still very popular and still the standard but they made the change to avoid losing their stranglehold on the market is probably the more accurate way to describe it.