It is a truly depressing day when you've waited 5 hours for a Zodiac Braves book FATE to pop, and fail to achieve completion because it gets so overrun with players that you get Silver instead of Gold.

If you're going to require a Gold rating to get credit in the book, then the FATE should spawn MUCH MORE FREQUENTLY. I suggest a 1 hour cap for ALL of the FATE's in the books to spawn. This would not only alleviate the amount of time players feel like they have wasted should they fail, but also reduce the likelihood that a FATE will be overrun by reducing the number of players that will accumulate in the time between spawns.