Add a search function to sort games by number of posts

I've used this site for a few different games (all of them using GURPS), but I'd like to play a D&D or Pathfinder game too. However, because those games are so popular, the postings for them can easily reach 30 or 40 within a day of being posted. I don't usually apply to them because it doesn't seem likely that my application will even be read, let alone chosen. If there was a way to sort games by how many posts are in their discussion sections, I believe it would alleviate the problem. Alternatively, a way to sort by time posted (which might exist but I haven't found) could work, as might something like a toggle for "show me when new games in this system are posted".

A high number of posts doesn't necessarily mean they're flooded with recent apps. It could also mean it's a long-running campaign that lost a player, and all the posts are old. I would like to be notified when a game appears that meets what I'm looking for though.