I think it's a very good initiative to have the help of editors to improve our presentation. I'm one of the first who often feel that I make mistakes in the English translation. I have basic knowledge, but with the help of the editors the publication is cleaned up, I can even improve my English and enhance that skill. That they get 10% of the publication as a profit seems to me a good way to pay for their services.
As for the challenges I would propose and can improve my idea of writing with the style of a particular writer, read his narrative and try to use his way of writing. Could a reading space be introduced to analyze and see the benefits of narrative?
Thank you again, it is a pleasure for me that you have enjoyed my story. I can say that I liked the story of @gilliatt The Island, it was really funny and I find it very entertaining, it made me laugh in many scenes.
That is a good idea to add to the list, thank you.