Re:Defold game engine source now available and free to use f...
by britzl on Tuesday May 19, 2020 @11:15AM
(#23235747)
Exactly. The license used for Defold (https://defold.com/license/) says:
* You are free to commercialise any software created using Defold * You are free to commercialise any plugin, extension or tool created for use with Defold * You are free to modify Defold and you are not required to share the changes * You are free to distribute original or modified (derivative) versions of Defold)
I'm fairly sure Epic don't let people fork, modify and then sell Unreal Engine either.