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Unity backtracks, no runtime fee for sub $1mil or for games on current/old versions
(blog.unity.com)
This is a most excellent place for technology news and articles.
They don't need good will, unfortunately. They just need devs to not abandon it for Unreal or some other engine, and the cost/benefits calculation on that is going to be made by short sighted people on a project-by-project basis.
Which is exactly why anyone in a position to do so should still drop Unity like a hot potato, sunk cost or not. We can't condone this kind of behavior.