A quick scan of Fleabay brings up 1 cent, 5 cent, and 25 cent pieces. Spinettis has a $1 for sale. That leads me to think they were for play, at least to some extent. I could see having a micro value like this as a promotional gimmick, but three?
Operational in the 90s - and yes, young folks, a penny was pretty much worthless then too. Maybe someone here knows more of the history.