Historically untrue. Stack Overflow promised that its data would belong to the users from the very beginning. The data was created by its users and belongs to its users. We saw what happens when a commercial entity starts to try charging for content generated by its users (mostly experts-exchange, but also imdb and cddb) and wanted to ensure that could never happen. Our creative commons data dump is a promise to the community that the content they've created can never be locked behind a paywall.