Parshas Lech Lecha: Whatever happened in the long run to the נֶפֶשׁ אֲשֶׁר עָשׂוּ בְּחָרָן ?

From Jewish History with Rabbi Dr. Dovid Katz by R Dr. Dovid Katz.

Could they be the עֵרֶב רַב? Were they enslaved by Pharaoh? Was it the threat of slavery that led them to abandon the Abrahamic religion?