It occurred to me after looking at the above photo of the Bryant Dark espalier, that for those who want to concentrate on the possibilities of propagating fig trees for profit, growing and training figs with horizontal stems, induces buds to grow straight upwards. Each horizontal stem after sprouting dormant buds, can produce many potential places for air-layering. Every one of those newer, sprouting stems that are growing straight up can be air-layered and sold as small trees.
A nice project idea to raise money for Boy/Girl Scouts, churches, class projects, etc. Have a fig sale! Celebrate (literally) the fruits of Capitalism.
Frank