Publica looks like a cool project alright.
Another content-based project I like is called Narrative (
https://www.narrative.network). They have not had their ICO yet though. Be interesting to compare them with publica. Looks like pubica is more book-focused whereas Narrative is more of a social network. I like the 'economy' structure in Narrative too.
Support for printed books for publica is cool.
I have checked Narrative, and as you said it seems that its focus on a social network somehow. also, their goals to achieve (based on their roadmap) is far away (late 2018).
but anyway, thank you for your thoughts

.