Two minor pops boosted, it will grow at a 2:1 ratio in favour of the minors. With two minor pop types it will also grow at a 1:1 ratio. With a booster on the Haroshems, it will grow at a 1:1 ratio. For example, with no boosters, a planet with a single Craver and Haroshem will grow at a 2:1 ratio respectively. You can maintain a balance of Craver to non-Craver population by using luxury boosters in the population screen to double the growth rate of minor pops, or by maintaining more than one minor pop on a system. This trait also means Cravers grow twice as fast as any other population. If you move the Craver, the malus no longer takes effect, but nor do the FIDSI bonuses.
To be clear, a planet with 1 Craver, and 10 non-Cravers will cause a -100 approval malus.
Slave Drivers: This is your faction affinity, and it means that all non-Craver populations on planets with Cravers will produce 50% extra FIDSI, at the cost of -10 approval. This is a serious problem if your planets deplete too soon. Once depleted, a planet will only produce 50% FIDSI. The rate of depletion depends on the size of the planet, the number of Cravers on it, and the game speed, which can make faster game speeds a bit of a struggle if you get a bad start. Depletion: Cravers will deplete planets per Craver population on planets.
