He used to make a few thousand per month on patreon - subscribestar and boosty numbers are nowhere near that. So he probably just dropped it. And since the dude never communicated properly anyway he's not gonna post anything and just let the meager funds trickle in from idiots who forgot to cancel
"Back when he was making just a few thousand a month on Patreon, he still took a whole year to release an update — like version 0.8 — so we still have around three months before it’s been a full year since the last update. Plus, he has a part-time job now, so it's understandable that things might take longer. And if he ever plans to quit the game, he’ll announce it — there’s no way he’d abandon such a masterpiece without saying anything."