Except he doesn't do this, at least not visibly on his patreon by the looks of it - not sure if images are sent out in private messages, if posts are actively hidden or if there are Third-Party rewards like discord rewards or similar.
I just skimmed through all the patreon posts chronologically - checked the tags they were set with, if those had nothing to do with rogue-like, read the titles and figured out what the post is about. The last post he made on his patreon that had nothing to do with Rogue-Like, fuckups from the platform or similar was:
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After that one, all posts have been about rogue-like and its development for the most part, a thank you to his patreons and the really big payment fuckup from sides of Patreon. So he isn't creating "Artwork and an Ero-Game", he's creating "an Ero-Game and maybe some Artwork" on his patreon page.
If he releases the art regularly, then he either doesn't do that visibly on Patreon - which is dumb in its own right, as those posts could lure in potential viewers that aren't interested in the game itself, or he is doing it on a third party platform: something I cannot for the live of me stand to see. If I were to sub to a person on Patreon I'd like to receive said rewards on that platform and not jump through hoops to get what I was being promised.
If he actually is sending out artwork on a regular basis, good, great even. But a look on his patreon does
not visibly reflect that in any way whatsoever, which is what people that aren't subscribed to him have to work with.