The 2003 NCAA Division I Men's Basketball Tournament involved 65 schools and was single-elimination.
"According to the finance section of the NCAA page, "The NCAA receives most of its annual revenue from two sources: television and marketing rights for the Division I Mens Basketball Championship and ticket sales for all championships
For the 202021 school year, Division I contained 357 of the NCAA's 1,066 member institutions, with 130 in the Football Bowl Subdivision (FBS), 127 in the Football Championship Subdivision (FCS), and 100 non-football schools, with six additional schools in the transition from Division II to Division I

