Each group of three is a different pattern. The patterns are free to those who volunteer to make at least one square for the cause and send it out.
If you know me at all you know I love to make squares, so I raised my hand as soon as I spied the request. Not to mention that I love Smooth Fox's Squares anyway and have collected many of them and hope to make a ghan with the patterns someday. Her patterns are always so easy to follow for me.