The bump is huge though! If your per-install fee costs $0.20 but you have 199,999 installs, you owe Unity $0. But the second a new user downloads your game, you

The bump is huge though! If your per-install fee costs $0.20 but you have 199,999 installs, you owe Unity $0. But the second a new user downloads your game, you suddenly owe Unity $40,000. If they made the price increase continuous and charged for max(0, #installs - 200,000), then that would be something else, but the way they wrote it implies a bomb waiting to explode if your game gets too successful