Since these aggressive / deceptive tactics are exactly what all the negative online reviews say about
Solar City as a whole, it seems to me that this must be their corporate strategy - the sales reps are actively trained to do this sort of thing.
The mysterious sphere hovering around the last
city, called the Traveler, is detailed during the game's plot,
as is the Darkness, the likewise mysterious force that's spreading across the
solar system and the
whole universe.