As far as technical writing ability is concerned, this dev claims the top spot among all the amateur devs on this site. This level of writing is something you rarely see in porn games. It's closer to professional tier fantasy writing.
This level of prose combined with the super fleshed out setting, incredible depth in all the characters, and nuanced themes means that this is a masterpiece in the making.
I just hope that the dev gets the recognition he deserves at some point. Unfortunately, we missed the explosive growth during the initial release. To be honest, that was expected. That type of growth generally only happens for derivative works with mass appeal (some combination of DAZ, contemporary setting, incest, high quality renders, harem, gud guy MC, pure love interests). All the things that this game does exceptionally are things that flies under the radar for the average porn game player.
If the dev sticks to it and releases regular updates, I think there should be some steady growth. I doubt it will ever get to 2-3K, but something like 500-800 per month should be attainable in a year or something. That said, promotion and advertising plays a significant part on patreon growth. Droid Production dev is very frequently seen in recommended games forum. He answers their questions with appropriate recommendations, but will sneakily(lol) plug his own game whenever it fits. Droid's game also has a laptop where he promotes some games by other devs (cross promotion).
If I may give some ideas, I see 3 games that are just starting out that will probably appeal to the same type of player. Tales of Legendary Lust : Aphrodisia, Parasite Black, and Elvensang. Maybe there are others with similar themes and quality that I missed. Maybe it would be mutually beneficial to all parties if you guys cross promote on patreon about the other games.
I'm sure most devs just want to make their games, but community involvement and promotion is probably a significant factor in patreon growth. Just getting involved in the forums (not just in the game thread) will be positive exposure. People see your post, look at your banner, and maybe get interested.
btw... when is next update? hehe