While I'm not one to suggest monetizing something that benefits a community I think you could reasonably monetize this by providing CaaS (ha! Coloring as a Service).
You could have weekly or monthly pdfs of generations emailed for particular themes like kids' school mascots, religious subjects like for Sunday school, curriculum subject correlating theme, etc.
Additionally, I would have it hide a signature somewhere in case someone starts scraping images and commercially selling them, or additionally license them to be able scrape them using Cloudflare.
While I'm not one to suggest monetizing something that benefits a community I think you could reasonably monetize this by providing CaaS (ha! Coloring as a Service).
You could have weekly or monthly pdfs of generations emailed for particular themes like kids' school mascots, religious subjects like for Sunday school, curriculum subject correlating theme, etc.
Additionally, I would have it hide a signature somewhere in case someone starts scraping images and commercially selling them, or additionally license them to be able scrape them using Cloudflare.