Absolutely! I will include some information on the main page for the license, including branding and what is considered fair-game for third-party creations. I'm fine with creations being sold by the creator, as long as they include a "compatible with GLIDE" declaration and the logo (as mentioned). Will need to do a bit more research as to how other print games handle this, so give me a few days before the update is available.
If you have more questions, please send me an email at sleepysasquatchgames@gmail.com, as it's easier to correspond in long-form.