Joseph purchased the land of the Egyptian people in
exchange for food and then, to emphasize their lack of ownership, rotated
the residence of the inhabitants from city to city.
This is stated
And Joseph bought all the land of Egypt for Pharaoh; for the Egyptians sold every man his field, because the famine prevailed over them; so the land became Pharaoh’s.
And [Rashi: Therefore to emphasize their lack of ownership]
he moved them to cities from one end of the borders of Egypt to the other end of it.
Rashi in this comment uses real world values to explain why Joseph rotated
the residences of the people. Since Rashi uses real-world values to explain
the causal relationship between the acquisition of the cities and the rotating
of residences we classify this Rashi as NonVerse.
Rashi makes additional real-world comments.
The rotation of the residences was not an important detail. The Biblical
text hilights this detail [right after the chapter relating how Joseph's family, the Jews,
come to Egypt and find they are sojourners] to show how Joseph made his
family comfortable, by treating the Egyptians like sojourners since they
also no longer owned their own land.