This is the best summary I could come up with:

This change led to a firestorm of understandable anger and recrimination across the game development community.

But in an FAQ, the company suggests that games released before 2024 will be liable for a fee on any subsequent installs made after the new rules are in effect.

Now, even developers who paid $1,500 for a “perpetual license” to Unity back then could theoretically be subject to additional per-install fees starting next year (provided their game is still generating sufficient revenue and installs).

Unity has yet to respond to a request for comment from Ars Technica, but a spokesperson outlined the company’s legal argument in a forum thread after reportedly “hunt[ing] down a lawyer”:

Broadly speaking, the general legal agreements signed by all Unity developers give some support to this position.

At least as far back as 2013, the Unity EULA has included a broad clause that says the company “may modify or terminate the subscription term or other Software license offerings at any time.”

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