Illyrian

One thing was planned to go to Moon, other thing went to Moon. ITS and BFR should be changed in same amount of details. This was crew vehicle by von Braun? ITS is almost same, but with shell?

That is same reason people had during gold rush in US. One more reason to leave Earth would be to leave countries with oppressive law systems. Of course leaders of Mars would have to declare independence, once they would become nearly self sufficient. You would have a choice to be common employee on Earth or land lord on Mars.

For corporations there is notthing or very little. But for common person possibility of having ownership of part of Mars and getting money just from selling resources would be very profitable. You don't have to transport it to Earth, since you have large community on Mars and those people would also need resources. What if you are lucky and you would own part of land with gold or platinum? Those are worth transporting back to Earth.

There is one thing. You can allow people to claim part of Mars and dig. Whatever they dig out it is theirs and they can sell it. US done that in past to lure people, it is called gold rush.