...people theoretically should be able to see what genres are most popular on the site at any given time.
While this may seem beneficial, it is largely useless for developers (to both find games and have their games found). After all, indie is by large niche-oriented. Take YouTube, for example. None of the popular/trending videos are what really interest me and the few broad categories are too darn broad. I cannot search properly for RPG game devlogs, for example.
What we really need is a site with a proper search and categorization. For example I want an 1)old school 2)isometric or top-down 3)turn-based 4)RPG in 5)fantasy or medieval setting games and developers. If your system could store that info and answer that query and indeed had most of the relevant stuff categorized, it would be really helpful. But the caveat is that the system then needs to be able to find all that, otherwise it's back to googling.
Anyway, just my 2c.