Actually you can register and use it right now through the API! Since the best way to use Less Neglect is by integrating through the API, we opted to launch using that method.
Developers who get it are immediately delighted so you create a positive experience from the start for your first users and naturally limit the early access to people who can actually start pushing data to your service themselves.
Yes, please steal it. We debated whether it would be a good idea to do API-only registration, but the response so far has been mostly really positive.