What does "Thanks again." mean in English for Spanish?

In English for Spanish, "Thanks again." means:

Gracias otra vez.

Listen to "Thanks again.": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 4, Level 3, Scene 2