Apparently I'm getting notifications from this thread because I replied to N_taii on it, so I'll provide some info to clear up the discourse here. Who am I to make any comments? I'm also a game developer who makes a fair amount of revenue on Patreon and have a good amount of experience publishing games on Steam.
1) Steam charges $100 to put your game up.
This is true. But you get it back if you have $1,000 in revenue. Regardless, a $100 fee is nothing in the grand scheme of things. Steam takes 30% of your post-tax and fess revenue anyway. The $100 is just to stop people vomiting endless shovel-ware they expect to sell sub $1,000 up as a business strategy.
2) Look at all this money people make on Patreon!
Patreon as a platform takes about 11-12% of that money after various fees. And that's only if you have a legacy account, new signups have a worse rate. Besides that, game development is an incredibly time-intensive and expensive business to run. You're basically programming a software project, writing a book, illustrating a comic, and composing an album at the same time. And either you do all those things yourself or you pay other people to do them for you. Either way that's a lot of time/money. Personally I make negative money on games, meaning the expenses of creating them are more than the revenue they bring in. So all the labor I actually do is essentially free.
3) So how much money is N_taii making?
I don't know, more than me since his base Patreon revenue is higher and his expenses are lower (this isn't speculation I talk to N_taii developer to developer fairly often). But almost certainly the time to money ratio is much lower than they could get working a normal job. So if you're "stealing" from them, you're not sticking it to a big rich corporation, but someone doing a passion project.
4) Wait, so these games aren't making the developers millionaires?
No, they're not. Even if you see someone with 1,000s of subscribers, almost all games here are more art pieces than business propositions. Even something wildly successful like Karryn's Prison basically just ends up being a normal software job money worth of take home money after paying all the people needed to create it.
Edit: This is just a statement of facts about how the NSFW games business operates. You can interpret the information however you wish.