It's entirely possible (likely, even) that the release date was supposed to coincide with the end of the card-a-week thing, but there were dire, game-breaking bugs that screwed the timeline. By the sounds of the post, there are still issues to be resolved. I guess we'll never know whether "July sometime" was always the intended date, or whether it was June-than-turned-into-July-please-let-it-not-be-August.