So you need to purchase this license only, if you intend to sell your art work on "Print On Demand" sites.
This license is for ONE kit you intend to use on your art work to be sold at "on demand" site. You can purchase this license for any kit/s you intend to use on your work, but you need to have separate license for each kits.
You can purchase multiple licenses at the same time, also for the kits you have already purchased. Then just email me for which kit/s you indend to use this license.
This license does not allow you to create content with my images (whole or any parts of them, as is or altered form) to new kits, collage sheets, DVDs or any other kind of supplies.
My email address is firstname.lastname@example.org.
If you have any concerns, not sure about how this applies to you, comments or questions, feel free to contact me.
(The only exception to this is free content created for Sebastian Michaels's students, which can be sold at ArtBoja without any extended license.)