I agree, I'm in the same boat. Thing is, Snapzu isn't populated enough yet for little niche tribes to exist, and be moderately active. I visit quite a lot of them on reddit. However, the major tribes here already have enough content for me while reddit (for me) oftentimes too much. Given how Snapzu feels better and has a pretty chill community, I'm here to stay.
If enough redditors explore Snapzu and feel the same way, maybe the niche tribes could become active, which could be a mayor motive for them to stay.