But now, what if you "donate" to a public park across the street from your house: Is it charity? Yes, you are giving money to the city/trust that you don't have to give. Do you benefit? Yes directly, your property value goes up and you have a nice place to walk. Does that make it "not a donation"? No. It just makes it a smart donation or even sponsoring a project.
In all cases he is securing his own supply chain, and for a very cheap price. It is a very rational business expense.
The fact people with this opinion exist also discourages donations from others because "nothing is ever enough" for you.
Also pro-tip, if you do more than a handful donations you'll realize that you as the giver is always the one that most benefits from being charitable. The feeling you get is why you do it.
(this sounds like an attack btw, as you can't know what I do)
"Sponsoring", "Supporting", "Paying", "Hiring", "Contracting", etc, this is all ok.
but calling it charitable donation is a bit too much; calling "donation" money that you give that directly benefits your own interest is something I don't feel is right. It's only about the wording, not the action.
"I made a video game and now I chose to give 500 USD to help women who need shelter because they are beaten by their husbands", or even 50 USD, or 5 USD.
then yes, this is charity, and beautiful.
But this is very different to "I sent 100K USD to the project I absolutely and critically depend on".
It's not about the amount or doing "more", or that people are never satisfied, is that if you give to people who work in your interest, it's strategic sponsorship (or contractors...).
It's two very very different things, under the same word: "donation".
ConcernedApe's next game is also built on MonoGame, so he has self-interested reasons to want MonoGame to continue to be maintained. But just because ConcernedApe has self-interested reasons to donate doesn't necessarily mean that it doesn't also come from a charitable place.
MonoGame is basically getting a sponsor. The ecosystem benefits. I'm personally happy to leave it there rather than asking for moral purity.