well... it has been an opportunity to build an artisanal microblogging client on top of a minimalist protocol. I agree on the hacker toy part.

And of course it's about being part of a niche community which is (mostly) amazing, and nurturing. As there is almost no one writing in my native spanish, it has been an interesting challenge to share my thoughts in english, as well.

I couldn't say it's a 'social network' per se, I think it lack many engagement things usually associated with social networks, although it has a social part of igniting discussions, learnings and behavioral changes, which is the meaning of social for me.