Change your restricted license and make it truly free software
I don't like these companies entering the market of free software users, knowing that free software was first created by the GNU project (https://www.gnu.org), but then deviating from it, calling it "open source". But hey, please, if you are an author, please don't use it commercially. That is nonsense, especially in the field of text-to-speech 😕. My God, how many people wish to help blind people, but you are restricting commercial usage. What is wrong with you? There is nothing bad in "exchanging" between each other 😒.
“Free software” means software that respects users' freedom and community. Roughly, it means that the users have the freedom to run, copy, distribute, study, change and improve the software. Thus, “free software” is a matter of liberty, not price. To understand the concept, you should think of “free” as in “free speech,” not as in “free beer.” We sometimes call it “libre software,” borrowing the French or Spanish word for “free” as in freedom, to show we do not mean the software is gratis.
See: https://www.gnu.org/philosophy/free-sw.en.html
Make it free, do not deceive people, and you cannot truly prevent people using it commercially, as you cannot know it.
Why don't you simply follow the Mozilla examples of free software? Do you think your company is trying to over-compete their TTS products? Spaces for free software are not really good places for restricted software 🚫💔😡