itch.io

Might I suggest Caveduck? It's the best site for chatbots imo. Even the free tier gives adequate amounts of tokens. It even has the feature of having more images that can appear over the course of the chat, and an automated memory function for free. Despite this, the female muscle bots seem to be rather few there.

Way better than it has any right being, I am insanely impressed. Heavy lore, an intimate scene, everything

I love Aino so much, I'd kill for someone can make a chatbot of her.  Might be easier for the devs to, since they can copy paste the lore descriptions (since many sites have the option for lorebooks).

option 1, but I don't think you have to revamp the images. I am strongly for the idea that early game can keep the old images, but new content should get new style images. 

Definetely would not like the newest images getting revamped, I really liked them, and better quality is subjective.