No matter the medium, you can't really force people to click links or read what you send them.
It's kind of an inherent problem with social a game such as BM. Sometimes groups don't really put the minimum effort required to further the collective good, it's hard to regulate behavior. The wiki is external, but linking to it is easy and can be done inside the text editor with [[ ]]. So when it's just a click away, is it really that less accessible on the wiki than on some remote in-game page, like guild boards, region descriptions, or realm bulletins? The wiki is now largely outdated, but that's a player problem. People used to be zealously dedicated to it, with many newspapers, realm pages, and such always up to date. The Forum sucked in a lot of that out of character activity, but decreasing densities also means that that there are a lot less potential contributors per page. Player ageing and game culture shifts are also to blame. It used to be that just about every realm had a handful of extremely dedicated players, who'd be on IRC at every turn change, keep all the documents up to date, go about and recruit others, and so on. Lots of them left, the rest just don't have the time anymore, now having kids, a career, and all. What is there to do? Can't really make up a rule that a realm needs at least X zealous players in order to exist.
