For those of us who develop apps or manage engagement strategy, is there any platform more infuriating, any terrain less stable, any regime more prone to arbitrary and capricious rule changes than Facebook?

Goodbye "fans"; hello "like". Goodbye boxes; hello profile tabs. Goodbye contests-with-dairy-products-as-a-prize; hello you-can't-have-contests-with-dairy-products-as-a-prize.

I'll say this much: My work in Facebook has allowed me to better embrace the impermanence of all things.