Luckey didn't even donate to Trump, he donated to an anti-Hillary group. He was a second-time REVOLUTION newbie Ron Paul supporter (one of those) and then accidentally voted for Gary Johnson. Probably because Carmack tainted him by strapping an Ayn Rand book to his face.
I'm more amazed at people who still are surprised by John Carmack. Hermit computer programmer who becomes a multi-millionaire at age 20, who dabbles in wrecking Ferraris and launching shit into space, ordered the same pizza for 15 years, opposes patents and promotes open source software, is an atheist and met his wife at QuakeCon. When he was arrested as a kid for breaking into a school to steal Apple II's his psych eval report mentioned "no empathy for other human beings." Any two of these is a potential sign of a libertarian, three is almost dangerously so, let alone literally all of them
I mean, that's if we ignore his .plan's, twitter posts, etc. that all have descended into the darkest musings of libertarianism on the regular.
He's arguably the most famous milkshake duck of all time.