This is not even close to breaking news.
A search returned at least 40 posts on this subject.
This one, from 2004, seems to be the oldest.
I believe that 66 unlimited F passes were sold. In addition to Cuban, Michael Dell, Willie Mays and Dennis Conner were buyers.
As for the Magic Johnson anecdote,
here is a video of Cuban telling the story (starts at 7:10).