It feels like you're ignoring the fact that the people who will actually download sandboxie are quite a bit smarter, and quite a bit more familiar with "finding

It feels like you're ignoring the fact that the people who will actually download sandboxie are quite a bit smarter, and quite a bit more familiar with "finding a download link" than the people you're describing? A giant "download" button is perfect if your general audience is "everyone". Sandboxie is _nowhere near that level of popular_ nor could it be. Heck, that's literally why it's going open source right now: it's so niche, with such a narrow demographic, that there's isn't even any appreciable amount of money to be made from the people that DO use it.