I dont really get the peasant situation, can someone please explain it to me? :3

When you found a colony, the more peasants it starts with, the less time it takes to get profitable. You can start it off with as much population as you have peasants, so endgame players bring literally millions of peasants with them from uni to uni to start off their new colonies.

The point I was making is that past a certain point, the peasants you are using to boost the colony cost more than pumping will earn you. That break point is around 20m at the moment (plus or minus a bit).