Lemons for Yeast for Flour: The Bartering Economy Explodes on Nextdoor

Nextdoor suddenly looks like Oregon Trail 2.0

Michael Brill of San Francisco needed lemons.

He was going to pick up some 15-year-old sourdough starter that a neighbor had offered on Nextdoor, and he wanted to bring something in return. The lemons from another neighbor’s lemon tree might…