Post Offered A Bonus In the Cereal Box

The Ernie Banks card given in the box is shown to buyers through a window.  As one might notice on the box, Post included two cards inside each box.  

Since Post shows the card as part of the display, should I try to get a box for each player in the set?

Here is the checklist for this set from 2001 - Ruth, Banks, Foxx, McCovey, F. Robinson, Killebrew, Schmidt, Jackson