The set included 36 players, with Bill Buckner being the only Cub. Billy Buck was given the set's top spot, a rare time a Cubs player was #1.
This is what the card looks like. It really doesn't remind me of a credit card. I don't know of many credit cards with a vertical layout.
Because there are upgrad versions of credit cards, Perma-Graphics put out a gold version of the baseball cards.