They need to avoid the trend of using that suffix to mean "enthusiasm"; the compound word does not conventionally mean what they intend. Yes, languages evolve, but the etymology doesn't remotely support it.

Whoa! I literally had no idea there were sub-reddits so, um, specific.

There's way more than you can imagine (or at least, that I can).

Another interesting point is that in general, the more specific the sub-reddit, the less it is infected with the type of "reddit culture" that gets so much bad rep here on HN (although occasionally it always gets some, cause Reddit has a shared culture--I personally don't mind, really).