Just as night begins to fall, you come across some people. They're cold, and they're scared, but they've made a pile of wood and they're trying to start a fire.  

The Salesperson's Dilemma is: How much can you charge them for matches?  

The Businessperson's Dilemma is: If you give them some matches for free tonight, can you sell them new axes in the morning?  

Then they get the fire started.  

And now the Entrepreneur's Dilemma is: Can you persuade them to try the bizarre experiment of rearranging the pile of wood into a big hollow box, called a "house", faster than they can burn the rest of the wood?