Right now, we keep it for user to access it later. User can choose to delete the photo and all associated pictures, as explained in https://portraitart.app/help
We do not use the data for other purpose.
This is a good suggestion. We will definitely think about how to design the UI to satisfy both.
The tool is not perfect. Sometimes it does not fully understand the image content. Also, right now, the image is slightly watermarked, but perfectly fine for using as coloring page.
And it seems personalized coloring page is very popular, we actually just decided to make the coloring pages free of watermarks, as our minor contribution to education. Will change the code to make that happen soon (in a few days).
We do not use the data for other purpose.
This is a good suggestion. We will definitely think about how to design the UI to satisfy both.