Matt Jackson has released The Forge, a Patreon-supported project on his blog that comes complete with details about who runs it and what is available at it. This is an example of one of the products that Matt is creating and releasing to everyone thanks to patrons who back.
Matt has also recently announced that he is licensing his maps for use by third parties, including commercial publishers. The terms he has is providing are very generous, and he asks that if you’re interested in using his maps that you contact him. He is offering exclusive licenses for map us as well.