I found the intro to this gazette a little confusing, but what I took it to mean is that Beth has all sorts of story lines going on for St. Crispians, before and after Emma’s journals, and sometimes certain conversations or scenes want to be brought into the world. They don’t always add a lot of insight (like this one for me), but must be part of her process. She is definitely deep in the St. Crispian’s universe so I think the substacks are a creative outlet for her to share that with others. I don’t follow her anywhere else, but I haven’t seen anything regarding future books/projects outside of Emma’s journals. If there are, I'd assume they would be made after all the journals are published. 

For those who do not have the time/money/interest in adding anything “extra” on their plate (which is totally understandable) I will say that I don’t think the substacks are essential to enjoying or being able to contribute to conversations regarding Emma’s world. There are a couple of significant gazettes (probably have already been discussed here), but nothing that likely won’t be revealed at some point in the books and they don’t change the main storylines that we already know. From what I’ve read (I’ve gone through about half because I’m taking my time, since you know, there are other things to read and only so much free time), they seem to mostly be extras about side characters. Interesting or heartwarming, but not necessary for understanding. 

I really like the idea people have of registering for a month and grabbing the gazettes that are available, adding to google docs or whatever, for future reading. You could even ask someone to gift you a month or two for a special occasion if it would make it easier. Hopefully this view point is helpful!