After the NBA and ABA merged, players could come out after high school. Still, there were only a few cases prior to Kevin Garnett coming out in 1995, so Nike and the other companies were only involved in the college game.
Some people want to give money to their children, buy houses, go on a holiday - whatever it is that they want to invest in. This particular journey has been something that I wanted to do most of my life, but there was no real opportunity to do so.