I was a developer on Dead Man's Hand published by Atari and developed by Human Head. I was assigned the development of a mini poker game that pops up before each level and potentially rewards the player with extra ammo, armor, etc. In real life, great poker hands don't come along often. In our game, we wanted the flip the odds so the player usually won something and only lost it all on occasion. I basically scripted the game based on what I wanted the odds to be and produced hands to match. This includes when the user trades in cards. The result ended up being very addictive and was called out specifically this review:

https://youtu.be/rjf3G43cUfg?t=1m55s