itch.io

One comment on principle. 

TTS Monster dominates the AI TTS scene. One of the strongest adverts you have is that you're one of the best VTuber TTS systems that do not use AI. 
So seeing the 'now works with Chat GPT' at the top is probably working against you. Even if you quietly allow a way to hook it in, I wouldn't advertise it because then you're competing with them instead of being the best alternative to those people with strong principles against AI.