Almost $5k on Patreon just from this game alone alongside whatever his other games makes is crazy.
There's another (Unity) game being discussed that shot up to 4,000-ish dollars out of nowhere after being out for like a month. There's a couple theories that might apply here: Paying someone with a bot network to sub to his Patreon page (you'd basically be getting 90% of your money back anyways after Patreon and the bot network take their cut) make it look like he/they are worth supporting. Money laundering, which is unlikely for this amount of money. Or their just actually making that much.
Not accusing the dev of anything, of course, as I could be wrong. But look at the interactivity of his Patreon posts. 0-3 likes on average. I'm no mathematician, but less than a percent of his 556 Patreons are interacting with the posts? The numbers don't add up. You can see similar botting behavior from Mr.Vision's (someone who's been confirmed to use bots)
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, 13.7K followers with six likes on a good post.