Hi Noah,
I don't quite understand your question.
Development Plus provides access to some features (hosting, deep data, etc.) that we can't otherwise provide access to in a free development plan...
I suppose it IS accessed via the [Go Live!] button - which can be a bit confusing - since your app isn't really "live" under Dev+. That's a UI inconsistency that we haven't addressed yet.
The full details of the various plans can be found here: https://getbraincloud.com/pricing/
I hope that helps!
Paul.