Think of your friends who play cards. The majority of these people probably have an old deck of cards that is held together with a rubber band, the box having been previously discarded. part of this effects commercial appeal is the fact that it can be used as an introduction to a series of rubber band or card effects, or as a "bridge" between the two.

The other part of the effect's commercial appeal is the novelty of the effect itself. There have been numerous "card and rubber band" tricks published, however, none of these tricks have explored the actual "linking" of the rubber band to the card, until now.
 
Condition Notes:  New item, though the outer box shows some wear from storage.