-is it necessary to write Fan fiction ? Can it be just fiction with own characters?
-if we write multiple chapters should they all be posted on the same day?
-8000 words is limit for just round 3 or it's a cumulative count of all previous rounds?
PS: You're the kind of mod this forum needed since long I hope your efforts yield everything good, also hopefully you'll get required support and appreciation
-The prompts are just a base of the story... you are free to take it forward the way you want. Say for example if a prompt is "Last Christmas I gave you my heart, the very next day you took it away"... from there you make a story about maybe revenge, or maybe second chance in love etc...
- No it is not necessary to write a fan fiction. You can create your own characters as well.