I'm not a huge fan of Sarah but I like her and I follow her on twitter. I've been a member of her site off and on throughout the years. I've noticed from following her on twitter that she has recently (within the last 6 months) broke up with her boyfriend. I think they had a long-term relationship. I'm certain that he is a huge reason why the updates on her site have slowed down. I'm guessing that he was her photographer, videographer, and "stunt cock". I'm sure he did a lot of the photo and video editing and such on the site as well. In fact, I wouldn't be surprised if he did most of the webmaster responsibilities on the site. Sarah might be a little overwhelmed by these responsibilities since she didn't have to do them before. I'm sure she was spoiled by her boyfriend. She hasn't quit, but maybe she needs to get her ass in gear and not be so lazy about it. It's not like it used to be back in the day. Internet models can't afford to be lazy anymore. I think I remember Sarah saying once that she worked maybe 8-10 hours a week. Well, in the real world, that's what most people work in a day. Guys are a little more tight with their money these days. If she doesn't get crackin, then she's gonna lose members. It's as simple as that.
Normally, I would say "it's not the end of the world if she decided she didn't want to do it anymore." However, I immediately remind myself that some people (not me, but I can sympathize with those who have) have paid the cash for a subscription to her site, and if there is not going to be any "new" content, they at least deserve to be notified. So I agree with this post.
If she did actually break up with her boyfriend, it is entirely possible you are right. Especially if he was the one who did most of the behind-the-scenes work. That said, I am sure there are any number of photographers who would be willing to work with Sarah on creating new content for her site. She is a pretty well-known internet model with a large amount of paid subscribers to her website.
Either way, something needs to happen before long, or you're right, she will start losing subs in bunches. She can either hire another photographer, do it herself, or let her subscribers know she is going to do most of her new stuff through other sites. If she keeps adding only old content to her site, she is just going to lead her paying subscribers on.