What is the reason for investigators not being eliminated when Yig awakens?

Question

When Yig awakens, one of the rule items says:

When an investigator is defeated or devoured, that player is not eliminated

What is the significance of this rule? What is the non-eliminated player doing for the rest of the game?

Answer 1

The player chooses a new investigator and keeps playing, which isn't the case for most ancient ones.