1. All the fertilizer made on the ship during the travel!
2. Vasari: Beat the *** out of them ! TEC: *** them all ! Advent: Preach people to go to church !
3. To explore it, to convert poeple over there, to keep faith in home planet, ... lots of stuff there !
4. Like a lot ! Seriously, at least 1 000 000 (less for Vasari, way more for TEC) mainly because we don't know how Vasari reproduce.
5. Because they're humans ! Think ! And because there's a lot of traitors who turned to become the advents ! Read SOASE Story.
6. No ! There's always those outsider who prefer small villages !
7. TEC TEC TEC TEC TEC !!! Since they're a bunch of rabbits and especially if race extinction is a possibility ! That's why Vasari enslave them ! Loads of them, reproduce fast, easy to manipulate ! Being Advent is more complicated, takes time and operations and ... No, forget it !