There is something junky about Pinterest and Quora— the experience of using it while not logged in is bad. Facebook has users in a strangle hold— afraid of alienating and being out of the loop on family affairs if they leave. Can someone convince me that Pinterest is not suceptible to an overnight diaspora if another service becomes more useful or fashionable? It’s great that Pinterest is making money but how will they defend themselves? If not, perhaps Pinterest would be a good long term short?
Plenty of folks have years worth of recipes, fashion ideas, etc. saved, so you'd need a good Pinterest-to-new-service importer, which I suspect Pinterest's API (which is, in my experience, actively hostile to developers) makes quite difficult.
