Those are pizza coupons?

Subway stamps?

C.C. gets a stamp for each pizza she buys, and once she fills in the card with all 12, she trades it in for an odd pillow-thing (Cheese-kun).

Sounds just like Subway stamps, except when you get 12 of those you can trade them in for a free sandwich.

Did this really happen in the Anime?

Seldon said:
Did this really happen in the Anime?

Almost like that, but the difference is that lelouch aimed the gun at his head instead of a pizza hut stamp card. Same effect though.