The irony of your comment is that once upon a time, these professional sports leagues made more money by being actively racist and excluding people of color from their leagues lest they upset their white fan base.
I don't know how long ago "once upon a time is" but they seem to have increasing revenue very successfully since the 80s at the least based on some googling. Maybe before then, but I don't know if we can find any data to support that.
