Why do some of you designers out there lock your courses....????? Just curious.......
Sage....

Not sure in today's world. But back during the pay course era, some of the designers were making their own textures and were more-or-less in competition with others to sell courses. They would lock them to keep others from using their textures and other creations. Also they didn't want anyone revising or changing their courses and then passing them around as if they created them. They were protecting their intellectual property, so to speak.