[dangrossman]

> Corporate promises don't mean much, I'll take laws, signed contracts or systemic assurances over them anytime.

Then you'll love the copyright license (CC) under which they offer the questions and answers for free copying and redistribution, the contract law that binds them to this license and the other terms of their site, and the systemic assurance this creates that they cannot put up a paywall around the answers we've provided. We can just take them with us to another site; many SO clones including the full content already exist, entirely legally.