<t> I don't think it really has a cap, I've seen Passenger ships migrating to colonies with 2000M at them. Plus the newer colonies I have never received migrants, even after waiting 2 hours( I am definitely sure they receive high development and a spaceport). They only populate by themselves with ...

<t> I have recently Managed to get DW working on my new PC, but every game or match I play has a bug with passenger ships, when entering mid-late game they will never migrate my citizens to my colonies(it also affects the AI empires too). They work early in the game as well as for the AI empires ...