Provocative claim! Maybe a better definition is something built in to your daily routine enough that doing the thing doesn’t take more than the effort inherent in doing it. Like if you were kicking yourself when you remembered that you’d meant to do it or otherwise spending cognitive effort on it when not actually doing it.
By that definition it would count as a habit if you’re doing something only because Beeminder makes you. I think people typically mean something stronger, like something is habitual if it takes neither cognitive effort beyond the actual doing of the thing nor requires any external prompting.
Related, @Paul_Fenwick’s Beeminder guest blog post, Failing your Goals with Beeminder.