The interesting thing is that this site should be a reflection of those participating in it. That means that either the audience is growing in a direction that

The interesting thing is that this site should be a reflection of those participating in it. That means that either the audience is growing in a direction that is not consistent with the original participants or that there is some other force at play trying to alter the content of the site. The first thing to do would be to figure out which of those two scenarios is at play and address that. If the tastes of the users has changed (or an influx of new users that have different tastes has emerged) then I'm not really sure what the answer is.