In reply to the original question (i.e. why do people sign up and then disappear)…
I am somewhat an example of this behavior. When I first signed up, I was more involved. Over a period of perhaps one month, I read every posting. I went through every thread, every category, etc. I got involved in a few conversations where I felt I might have something to contribute or I had a question. I posted new threads a couple/few times.
However, after that period of time, the new-ness wore off. After a while, there was not enough additional, completely new postings (not just repeats of previous subjects, etc.) to hold my interest. I think that is probably very natural in a low-volume forum such as this.
Also, and I am sorry to say this, I got tired of hearing some folks repeating stories/histories several times – though I am very sure those postings were useful and relevant to more recent members.
I also tired of the religious discussions. I know that’s my problem; I know I can just go on to a different thread, which is what I eventually started doing. (Just because something is there does not mean I “have to” read every word.)
Also, in my particular case, while my wife and I have evolved into anal-only as many here have, I (a man) also have my solo interests in solo anal (receiving) activities with toys and in my wife fisting me. I was originally hoping that I might encounter a few discussions along that line (solo anal, anal fisting, etc.), but I discovered that these particular types of activities are not shared by many (if any?) members (other than plugging related to females receiving anal). So, while I do enjoy the variety of postings about female-receiving-penis anal activities, I miss the possibility for broader anal discussions.
As they say, it is what it is. I am not suggesting that this forum should change or expand its scope. It is fine as it is. I can seek discussions of other types of subjects elsewhere. However, as a low-volume forum, there will always be an issue with folks dropping out because there are not enough new and different discussions.
After going quiet for about a couple months, I have started checking in again, every few days. I have been catching up on and enjoying the more recent posts.
BTW, I am very clear that this is not a dating site and I am not seeking (and I hope I never will be) dating. However, I think that it would interesting and appropriate to have more discussions of HOW folks who are seeking anal-only dating / relationship opportunities would go about that these days. (If I were in the dating mode, I certainly would NOT subscribe to the “take your chances and see if anal-only will develop in a few years” type of strategy – that is not a strategy, that is “hopes and prayers”.) “Stuff happens” and any of us might again, at any time, find ourselves partner-less. I think openness to this subject could hold the interest of more folks.
Lastly, the mods are doing a great job – bless them. Either an additional duty for the mods and/or for folks I will call “spark plugs”, might be to “create” discussions. Intentionally, and with some regularity, start a thread/topic that is a little different than has been discussed in the last (??? quantity) of months as a vehicle to heighten the interest of old and new members and to promote conversation. The more conversation there is, the greater the chance that newer members will get more deeply involved and stay involved for longer.
Thanks for everything that everybody has done. I will stay tuned and I will contribute topics from time to time as they occur to me.