You can quit a Patreon subscription any time. 1 dollar to find out the truth is a price I'm perfectly willing to pay.
Also, I have known games 'in development' for well over a decade. Who eventually still got completed. It's called a free-time hobby project of someone with a full-time job.
If he actually isn't charging on Patreon, then it will be a good reminder for when he ever does release an update.