My mind about this has always been in a couple directions, but none of them point towards not open sourcing things. So, for one, I very heavily doubt that anyone would take this source code in Lisp of all things and release a product that could actually damage my sales. And even if they did so history shows that there's very likely practically nothing I could do about it. I'd just have to be upset about it happening, with no real chance of repercussion.
It is far more important to me to show confidence in my vision and to let other people learn from what I've done. In my view a lot more games should be open source, because far too much of the process is hidden behind mysticism, with far too many people wasting a ton of time reinventing things from scratch.
And, well, finally, I'd ultimately like to make everything I do available for free, anyhow. The only reason I'm selling Kandria is because there is no UBI in this country and probably won't be for many years to come, so I have to fund things somehow.