May I ask if this project is some sort of experiment / proof of concept or actually for profit?

My goals are to have fun and help build something awesome. I imagine those purchasing NastyFans seats do so with the intention of earning a profit.

How much is a share/seat?

Take a look at the NastyFans thread where there is plenty of information available on seats:
https://bitcointalk.org/index.php?topic=86854.0

LAST SEAT PRICE: