Zero population colonies.

[Q]

Thanks Mephisto for this information. I never saw it before until now. Do you know why it was changed and why this difference was made between plagues and other reasons for the eradication of the population?

[Mephisto]

Do be honest I don't have the slightest idea since when this "feature/bug" was introduced. But it at least prevents some easy vitory over the AI by bombing all the planets with plague bombs and watching the AI die.