From the article: Note, the games will be "free as in 'free speech', not as in 'free beer'": see each license for the full, finalized details as they come out

From the article: Note, the games will be "free as in 'free speech', not as in 'free beer'": see each license for the full, finalized details as they come out very hopefully this week -- stay tuned. It is the underlying code that will be made available to everyone Maybe the Humble Indie Bundle will finish and they will switch to another form of sales, but they are not stopping selling the games.