If you don't open source it, it will either wither and be abandoned or someone clever will "open source it" for you in a way you may not like.
Software is hard to kill. See Softpress Freeway as an example in the same industry.
Software is hard to kill. See Softpress Freeway as an example in the same industry.
With AI and other tools developing rapidly, I wouldn't be surprised if someone was able to do things with your code in ways you didn't expect, even if you choose not to open source it yourself.