Through Antisocial etc.

Do you still designate a resource for these cards?

Yes, you do indeed pick one.

Tagrineth said:

yeah it would become relevent at some point due to all the siegfried support running around

Da_ghetto_gamer said:

Or the game rules which state:
11.13.1 Before a player plays or places a card with the infinity symbol into play, they choose one of the other twelve resource symbols; the infinity symbol is that symbol as long as the card is in play.

The Staging area is an in play area.