We took a long, winding boat ride down the river towards Tonlé Sap. On the one hand, marginal cost doesn’t appear to be a resonant concept, as you pay not per boat, but per person on the boat. And it was a long and winding trip on possibly the slowest boat on the river. But in addition to the marvellous floating village (stay tuned), locals deliver $1 beers to your boat, Sam got a swim, and the sunset was spectacular. Not a bad way to spend an evening.