I'm not sure why you mention "full-time". A founder is someone involved from day zero or at least before and up to incorporation. Whether they spend time or mon

I'm not sure why you mention "full-time". A founder is someone involved from day zero or at least before and up to incorporation. Whether they spend time or money doesn't matter. What matters is when If you're talking about people who have plans to join the startup at day zero but will only manage it a month or so after founding due to logistics, then it's more interesting. It gets more debatable. However, Musk isn't a founder since he was not involved until the series A as far as I'm aware. Despite what Tesla and Eberhard agreed to, I don't think he's a founder.