I favor the Pay-To-Play for a full product over the Patreon model for a few reasons:
1) The motivation for creating these types of games is coming and going so devs tend to abandon products such as this, resulting in an almost inevitable disappointment by the players.
2) You owe something to your patreon, which is accompanied by a stressful feeling of being obliged to deliver a specific amount of content on a time-based interval.
3) Patreon is for developers who look to create a "franchise"-like set of adult content, I rather just be gone.
4) I think itch has a refund solution implemented to it.
I think people are just not used to the pay-to-play model for these types of games. 10$ Is not much.
If you spend an evening pleasantly with this game, than it is equivalent to spending time and paying for couple o' beers in the local bar. But this game is here forever and delivers more than a few hours of fun.