And those supporters should be aware of this. Unlike many other porn related Patreons (and possibly non porn as well), Mithos is transparent. If you're a supporter and don't like that he's using his time and resources to learn what he says he's learning, then you can simply drop the support. Patreon is not a storefront where you use your money to buy a product. You support a creator so they may continue doing what they're doing.
In essence Patreon is indeed a tip jar with pledge tiers being a "thank you".
But Mithos isn't just getting supported to learn UE, because they think it's so swell he's learning a new skill.
He's getting supported, because he knew damn well horny people will pay up for boobs. If making this porn game was his passionproject that requires him to learn UE, that's fair and I think that's what most people sign up for. But he's advertising a porn game, but clearly not that invested in it. If he could make the same money by doing a different project, he would.
So this isn't just a tipping situation. He is catering to his supporters beyond his ambitions while for many youtubers that isn't the case (though for plenty it is)
I don't really mind, I'm not a patreon, but this is a morally gray situation, it is a commercial exchange, not so much "supporting a budding artist"
Ask yourself if the one you're backing would still want to make the stuff if no money was involved. If not, than you're not just tipping. And for many artists, youtubers, they'd still want to do what they're doing. Like Shadman, you couldn't stop him from drawing porn.