It's crazy how successful they've been off just making and selling a good indie game. They're still doing free updates AND they can afford a $200k donation?
Terraria is like the anti-modern game. They absolutely refuse to evilly monetize their game at all. The playerbase is almost on their knees, begging them to move on from Terraria and make something else (not because Terraria is bad, but they've been at it for over a decade!) and they continue to churn out updates. The fanbase voted for a set of features to appear in Terraria 2, which they then turned around and scrapped, and added it as an update to Terraria. And all their updates are always free. And can't forget about their amazing mod support.