I have been a Patreon supporter off and on. Overall I'd say it is absolutely worth it to join for at least a month (it is just $10). Also I like to support his excellent work in general, and don't mind paying $10 here and there to support the work.
There are dedicated Camset files to program your camera (nearly all semi-recent Sony Alpha cameras are supported) into a dedicated Portrait, Action, and Landscape modes for 1, 2, and 3. These work extremely well by default and significantly improve the overall functionality / work flow when using the camera (of course you can change them to your liking).
There are also 400+ page e-book presentations that go over the many camera features in detail. This is a nice compliment to Sony's own documentation. Also within the e-books are many linked videos showing how to go over items.
Last there are many seminar videos that cover various topics, and there is a nice general Q/A section available for the premium plus members.
Yes so overall I'd say, yes check it out for at least a month. He is very clear, that he doesn't mind if you just subscribe for a little while, and then come back later. I also must say he and his team is very active in updating the e-books, camset files, and other items as needed when new features are added. This is why it is good to periodically rejoin as needed.