Unity

One year after increasing the costs of its enterprise and professional editions of its game engine, Unity implemented a new fee structure for smaller developers that exceed certain benchmarks for income and installs.

Any game that has surpassed a revenue and lifetime install threshold in the previous 12 months will be subject to a Unity Runtime Fee beginning January 1, 2024. This fee will be charged by Unity. In a typical scenario, the use of Unity Personal is completely free, whereas subscribers to Unity Pro must pay $399 per seat.