You are completely missing that it turns into lottery from perspective of potential writer.
You are asking people to spend enormous amount of work on writing 600 pages and hope that what they and what you consider as high-quality will align. AND that 10 slots will not be used up before they will complete.
This way only people willing to take big risks and with plenty of spare time will remain.
I would strongly suggest to start from something shorter.
BTW, is 60 000 pages sufficient to train some pattern matching like GPT-3?
From what I remember they were supposed to be censoring/blocking things like that.
Have they setup own instance or got around censors?