1. They make your work incompatible with a growing body of free content, even if
you do want to allow derivative works or combinations.
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This means that it can cause problems when another modder wishes to include your
work in a modpack or game.
2. They may rule out other basic and beneficial uses which you want to allow.
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For example, CC -NC will forbid showing your content in a monetised YouTube
video.
3. They are unlikely to increase the potential profit from your work, and a