I geuss my question is... why don't they? TIL, from what I can tell, started off as a simple depository for in-game lore books. UESP seems to have had the same original function (judging by the archives of what their old website looked like). USEP also includes a bunch of (often innacurate) synthesis articles, plus gameplay information. TIL has some much better synthesis articles, plus dev comments. Obviously, they're different websites. My question is, why did both of them get started? Why doesn't USEP allow for dev comments to be added (I'm fairly certain that every other fan wiki I've ever been on allows for 'em), or why doesn't TIL add a gameplay section? As you said, these two websites split the lore depository userbase.
What I don't get is why USEP, TIL, an T0 haven't merged. I tend to get involved in fandoms in vigorous little bursts, and because of this, I've looked at an above-average number of fan communities. In my experience, fansites for obscure topics usually feel the need to merge together. The ES Lore community stands out in my mind as being remarkably... (I still haven't found the proper word) multi-located (?) while being rather small. Just, for example, consider how we're a much smaller group than the regular-strength ES fans, yet they all seem to stick to the BESF, while we're split up on multiple sites.
I also understand why groups of people on these forums would develop relationships. I recall that you and Proweler and a few others were all still active here the last time I was actively involved in the lore forums, years ago. I get the impression that you kept at it, and had been going at it for years and years. If there weren't a whole tangle of interpersonal relationships between all of you after all that time, then I'd have to start with the alienating jabs . As a matter of fact, I'd say that these forums are actually quite low on real divisive subgroups, especially compared to the more fanatic fangroups I've participated in. At the very least, none of us have anolyzed what the bodily fluids of the Argonians would taste like, and none of us insult eachother by bringing it up all the time. If you don't get the reference, you should be very glad.
In fact, all of you oldies seem very friendly and inclusive. You help people out, try to encourage their interest, and only ever get dismissive when people start actively pushing your buttons. I'd say that there's a bizzare phenomena here where the legacy fellows, the guys like you and Proweler, are actually significantly more mature than the average forumer, and perhaps even the average human. That's why all of this... site devisiveness (?) makes no sense to me. I get why the guys on No Mutants Allowed hide out there, and why the Fallout Community is so split up. There's some deep divides, some bitterness, and some immature, "THIS IS MY SIDE OF THE ROOM" stuff going on that naturaly leads to the development of fractured websites. On the other hand, I don't really see any of that going on in this extended community. To continue my poorly chosen "girls bathroom" metaphor, it's one thing if you find out that people are saying rude things about you where you can't hear it. Once you find out about that, you get offended and that's that. It's a whole other thing when people almost seem to be hiding away completely innocuous comments. That's just puzzling, and when you find out about it, you want to ask why*. Now, you've already done a more than adaquete job of reminding me why non BSF forums are important, what I don't get is why the unofficial sites are so disparate, and why the TIL forums seem so... cloaked**
So, you're not mentally "set to keep people out". That's cool. But why are all the sites kinda set up in such a way that it keeps things apart? Is there a story behind this?
*I have no idea if this is something that you can relate to. I've lived a somewhat strange life, so I'm not sure how well my experiences translate, but this has happened to me several times.
**The link "Storyboard" sounds like it'd contain, y'know, actual storyboards, not a forum, and the "Lore Forum" is mostly dominated by a huge off-topic thread. It's not exactly straight forward.
EDIT: Damned emoticons, always ruining my lists!