Fantasy.ai is the official and exclusive hosted AI generation platform that holds a commercial use license for Hassan Mix, you can use their service at https://Fantasy.ai/
This means commercial platform use is exclusive but non commercial use is fine. You as a user can download the model free as always, use it, merge with it, train with it, sell your images and content made with this but it just can't be used on a commercial platform for like commercial txt2img generation services, commercial finetuning services etc
This is finetuned over SD1.5 a couple of thousand fantasy style images. Use HassanFantasy Style for the trigger. Please try out the sample prompts, it will be a different style of prompting you are used to
You can view sample prompts from a bunch of my models on my page here