This stock is distributed under the Resurgere Stock License. As such, commercial use of this stock item is strictly forbidden, unless you have prior permission from the Resurgere Producer of the stock item. However, you are allowed to use Resurgere stock in your noncommercial projects.
You can make brushes for your own use, of course... But you can't distribute any brushes you make out of Resurgere stock. If we wanted our stock in brush form we'd make and hand them out that way ourselves.