Good news! Unity are officially removing the runtime fee from the personal lisense only. Here are the contents of the e-mail I received:

Hello there,

We just shared an open letter on our blog about the changes we’re making to the Unity Runtime Fee pricing policy that we announced last week. These changes were made based on feedback from our community, and we want to ensure you’re aware. We also invite you to read the FAQ for more details.

At a high level, this is what we’re changing:

• Unity Personal: No Runtime Fee, splash screen optional. The Unity Personal plan will remain free and there will be no Runtime Fees for games built with the plan. We will be increasing the revenue limit from $100,000 USD to $200,000 USD and we will remove the requirement to use the Made with Unity splash screen (starting with the LTS version releasing in 2024, currently referred to as the 2023 LTS, or later).

• Runtime Fee is forward-looking. For Unity Pro & Enterprise, the Runtime Fee does not apply to any games created with any currently supported Unity versions. It only applies to games created with or upgraded to the LTS version releasing in 2024 (currently referred to as the 2023 LTS) or later.

• Editor Terms. We will make sure that you can stay on the terms applicable for the version of Unity you are using - as long as you keep using that version.

• Runtime Fee, self-reported. On a monthly basis, you have a choice of the lesser of 2.5% revenue share or the calculated amount based on unique initial engagements. Both are self-reported from data you already have available. You will always be billed the lesser amount.

Thanks for creating with Unity,

The Unity team