Yes, Big Ten requires scholarship athletes who are coming from high school to be provided four-year guarantees on their financial aid. After four years the program can tell them their scholarship will not be renewed. This applies for junior college or four-year transfers but it only extends to the end of their original four years of eligibility. For example, if a high school bball players goes to Texas, redshirts as a freshman, plays as a sophomore before transferring to Illinois, then they only need to "guarantee" their scholarship for two years even though they have three years of eligibility remaining. It used to be a non-factor but now that (a) student-athletes can transfer without sitting out and (b) COVID has given countless athletes another year of eligibility, it's become more of a tool for schools looking to nudge athletes along.