At this time Fold and Lose are the same mechanic. Fold is largely there as a realism factor. Since there is no "upping the ante" during each hand in the game, it isn't advantageous to use it. It was included to be consistent with real poker.
In the future this may be re-worked to more interesting mechanics, but at this time I'm focusing on my primary project Dress Code as well as some other simpler games/graphic novels.
Thank you for the feedback!