It looks like that devs sold most of their coins. Good luck guys.
I just did a random sample of the first 8000 books and it appears the vast majority of premined coins have not been spent. I did find 500 coins out of 10000 have been spent from AQS1w7wyXQjPiE29LtA8ER8DbSQii4vSk7
https://btgexp.com/address/AQS1w7wyXQjPiE29LtA8ER8DbSQii4vSk7.
Please do share your analysis which made you arrive at your conclusion. I must admit my sample was a little small. However, you made the claim. Now get to showing us the proof.