This is getting off topic, so I will give my reply and then if we decide to pursue this we should open our own thread…
A WiP thread’s main purpose is to gather feedback. Part of that gathering process is to direct your testers … in a public beta, there will be those that only desire to express their fan-girl support (or fan-guy?) but an author really should be pro-active in conducting a WiP beta test – open, closed, public or private.
This is not a release of a final product into the wild – that is only accomplished when you publish.
This is not even an “early-access” release like you see on Steam – Hosted Games does not have the tools or the set-up for this type of game release.
These are not even betas in the traditional gaming sense. I’ll find the quote from 5 or so years ago that emphasizes this… brb with it.
Edit 1 -
With these definitions, we see that staff consider most WiP threads now opened as Alpha threads… I’m not sure I’ve seen actual betas as defined here in a very long time (not even “official CoG” WiP threads were completed drafts yet) …