Back when my Tumblr for fairies vs tentacles was stil alive, there was a bonus pack that you could download that contained the older exclusive content from Patreon, approved for public release by the patrons themselves. I am in the process of uploading that content on my new blog, which will eventually have even more recent content that the pack had (year 3!), but in the meantime, if you didn't get the chance, you can download it right here from googledrive:

https://drive.google.com/open?id=1HAf_rFqfTiCF-OztG8lKH9mJy_UntvBK

(Warning the pack is around 500 mb)
It contains all kind of things, some naughty art pieces of course, and non canon sillyness, but also character designs, places and creatures we have yet to see in the comic, lore elements, and so on. It's worth checking if you're an avid fan of the comic.