For some years now I've been maintaining a calendar of British RPG conventions, currently at http://www.philmasters.org.uk/RPGs/conve
I've noticed that I've been receiving few notifications or announcements from conventions recently, so if I don't happen to hear about or pick up on an event, it doesn't get an entry on the page - and nobody then complains. I also get very few comments on it in person at the conventions I attend myself. And, though I absolutely do not maintain the page in the hope of making a profit, I do notice that the tip jar feature has received exactly zero income in all the time it's been open.
This is pushing me toward the conclusion that the page is no longer of any use to anyone, presumably because gamers are hearing about conventions through this new-fangled socially medium stuff or something. Hence, as maintaining it costs me a little time and effort, I'm considering just letting it die.
However, if it does still serve a useful purpose, I'll be glad to hear it, by e-mail or through comments here, and I'll try to keep it going.