"We are introducing a Unity Runtime Fee that is based upon each time a qualifying game is downloaded by an end user. We chose this because each time a game is downloaded, the Unity Runtime is also installed."

This reads as something insane. If a player replays a game on steam, redownloads it, the developer still pays for the installation? I know people who redownload games all the time, like tens of times over the span of several years. I hope it's imprecise language and only the initial install/download is counted.

I hope these changes (whatever they actually are) won't push game developers towards developing games that milk users more, with loot boxes, in-game currency, cosmetics etc, and away from stand alone you-pay-once games, single player or multiplayer, only to be able to pay for the ongoing engine fees.